sentences.text: Vomit Comet is a nickname for any airplane that briefly provides a nearly weightless environment in which to train astronauts, conduct research, and film motion pictures.
sentences.text: Vomit
sentences.text: Comet
sentences.text: is
sentences.text: a
sentences.text: nickname
sentences.text: for
sentences.text: any
sentences.text: airplane
sentences.text: that
sentences.text: briefly
sentences.text: provides
sentences.text: a
sentences.text: nearly
sentences.text: weightless
sentences.text: environment
sentences.text: in
sentences.text: which
sentences.text: to
sentences.text: train
sentences.text: astronauts
sentences.text: ,
sentences.text: conduct
sentences.text: research
sentences.text: ,
sentences.text: and
sentences.text: film
sentences.text: motion
sentences.text: pictures
sentences.text: .
sentences.text: Versions of such airplanes have in the past been operated by NASA's Reduced Gravity Research Program since 1973, where the unofficial nickname originated.
sentences.text: Versions
sentences.text: of
sentences.text: such
sentences.text: airplanes
sentences.text: have
sentences.text: in
sentences.text: the
sentences.text: past
sentences.text: been
sentences.text: operated
sentences.text: by
sentences.text: NASA
sentences.text: 's
sentences.text: Reduced
sentences.text: Gravity
sentences.text: Research
sentences.text: Program
sentences.text: since
sentences.text: 1973
sentences.text: ,
sentences.text: where
sentences.text: the
sentences.text: unofficial
sentences.text: nickname
sentences.text: originated
sentences.text: .
sentences.text: NASA then adopted the official nickname Weightless Wonder, for publication.
sentences.text: NASA
sentences.text: then
sentences.text: adopted
sentences.text: the
sentences.text: official
sentences.text: nickname
sentences.text: Weightless
sentences.text: Wonder
sentences.text: ,
sentences.text: for
sentences.text: publication
sentences.text: .
sentences.text: The airplane produces weightlessness by following a parabolic vertical flight path.
sentences.text: The
sentences.text: airplane
sentences.text: produces
sentences.text: weightlessness
sentences.text: by
sentences.text: following
sentences.text: a
sentences.text: parabolic
sentences.text: vertical
sentences.text: flight
sentences.text: path
sentences.text: .
sentences.text: A parabolic flight path is the same path that would be taken by an object in free fall, such as a cannonball fired into the air.
sentences.text: A
sentences.text: parabolic
sentences.text: flight
sentences.text: path
sentences.text: is
sentences.text: the
sentences.text: same
sentences.text: path
sentences.text: that
sentences.text: would
sentences.text: be
sentences.text: taken
sentences.text: by
sentences.text: an
sentences.text: object
sentences.text: in
sentences.text: free
sentences.text: fall
sentences.text: ,
sentences.text: such
sentences.text: as
sentences.text: a
sentences.text: cannonball
sentences.text: fired
sentences.text: into
sentences.text: the
sentences.text: air
sentences.text: .
sentences.text: As a result, the aircraft does not exert any g-force on its contents, so the contents have zero apparent weight relative to the aircraft.
sentences.text: As
sentences.text: a
sentences.text: result
sentences.text: ,
sentences.text: the
sentences.text: aircraft
sentences.text: does
sentences.text: not
sentences.text: exert
sentences.text: any
sentences.text: g-force
sentences.text: on
sentences.text: its
sentences.text: contents
sentences.text: ,
sentences.text: so
sentences.text: the
sentences.text: contents
sentences.text: have
sentences.text: zero
sentences.text: apparent
sentences.text: weight
sentences.text: relative
sentences.text: to
sentences.text: the
sentences.text: aircraft
sentences.text: .
sentences.text: The aircraft heads upward at an angle of 45 degrees.
sentences.text: The
sentences.text: aircraft
sentences.text: heads
sentences.text: upward
sentences.text: at
sentences.text: an
sentences.text: angle
sentences.text: of
sentences.text: 45
sentences.text: degrees
sentences.text: .
sentences.text: As soon as the pilot begins the rotation into the parabolic trajectory, weightlessness is achieved.
sentences.text: As
sentences.text: soon
sentences.text: as
sentences.text: the
sentences.text: pilot
sentences.text: begins
sentences.text: the
sentences.text: rotation
sentences.text: into
sentences.text: the
sentences.text: parabolic
sentences.text: trajectory
sentences.text: ,
sentences.text: weightlessness
sentences.text: is
sentences.text: achieved
sentences.text: .
sentences.text: This lasts all the way " up-and-over the hump ", until the craft reaches a declined angle of 30 degrees.
sentences.text: This
sentences.text: lasts
sentences.text: all
sentences.text: the
sentences.text: way
sentences.text: "
sentences.text: up-and-over
sentences.text: the
sentences.text: hump
sentences.text: "
sentences.text: ,
sentences.text: until
sentences.text: the
sentences.text: craft
sentences.text: reaches
sentences.text: a
sentences.text: declined
sentences.text: angle
sentences.text: of
sentences.text: 30
sentences.text: degrees
sentences.text: .
sentences.text: At this point, the craft has lost a significant amount of altitude, and must begin to pull into a hard upward turn.
sentences.text: At
sentences.text: this
sentences.text: point
sentences.text: ,
sentences.text: the
sentences.text: craft
sentences.text: has
sentences.text: lost
sentences.text: a
sentences.text: significant
sentences.text: amount
sentences.text: of
sentences.text: altitude
sentences.text: ,
sentences.text: and
sentences.text: must
sentences.text: begin
sentences.text: to
sentences.text: pull
sentences.text: into
sentences.text: a
sentences.text: hard
sentences.text: upward
sentences.text: turn
sentences.text: .
sentences.text: The forces are then roughly twice that of gravity on the way down, at the bottom, and up again.
sentences.text: The
sentences.text: forces
sentences.text: are
sentences.text: then
sentences.text: roughly
sentences.text: twice
sentences.text: that
sentences.text: of
sentences.text: gravity
sentences.text: on
sentences.text: the
sentences.text: way
sentences.text: down
sentences.text: ,
sentences.text: at
sentences.text: the
sentences.text: bottom
sentences.text: ,
sentences.text: and
sentences.text: up
sentences.text: again
sentences.text: .
sentences.text: This lasts all the way until the aircraft is again halfway up its upward trajectory, and the pilot again initiates the zero-g parabola.
sentences.text: This
sentences.text: lasts
sentences.text: all
sentences.text: the
sentences.text: way
sentences.text: until
sentences.text: the
sentences.text: aircraft
sentences.text: is
sentences.text: again
sentences.text: halfway
sentences.text: up
sentences.text: its
sentences.text: upward
sentences.text: trajectory
sentences.text: ,
sentences.text: and
sentences.text: the
sentences.text: pilot
sentences.text: again
sentences.text: initiates
sentences.text: the
sentences.text: zero-g
sentences.text: parabola
sentences.text: .
sentences.text: In general, this aircraft is used to train astronauts in zero-g maneuvers, giving them about 25 seconds of weightlessness out of 65 seconds of flight.
sentences.text: In
sentences.text: general
sentences.text: ,
sentences.text: this
sentences.text: aircraft
sentences.text: is
sentences.text: used
sentences.text: to
sentences.text: train
sentences.text: astronauts
sentences.text: in
sentences.text: zero-g
sentences.text: maneuvers
sentences.text: ,
sentences.text: giving
sentences.text: them
sentences.text: about
sentences.text: 25
sentences.text: seconds
sentences.text: of
sentences.text: weightlessness
sentences.text: out
sentences.text: of
sentences.text: 65
sentences.text: seconds
sentences.text: of
sentences.text: flight
sentences.text: .
sentences.text: This often produces nausea due to airsickness, especially in novices, giving the plane its nickname.
sentences.text: This
sentences.text: often
sentences.text: produces
sentences.text: nausea
sentences.text: due
sentences.text: to
sentences.text: airsickness
sentences.text: ,
sentences.text: especially
sentences.text: in
sentences.text: novices
sentences.text: ,
sentences.text: giving
sentences.text: the
sentences.text: plane
sentences.text: its
sentences.text: nickname
sentences.text: .
sentences.text: NASA has flown parabolic flights on various aircraft for many years.
sentences.text: NASA
sentences.text: has
sentences.text: flown
sentences.text: parabolic
sentences.text: flights
sentences.text: on
sentences.text: various
sentences.text: aircraft
sentences.text: for
sentences.text: many
sentences.text: years
sentences.text: .
sentences.text: In 1959, Project Mercury astronauts trained in a C-131 Samaritan aircraft, which was dubbed the " Vomit Comet ".
sentences.text: In
sentences.text: 1959
sentences.text: ,
sentences.text: Project
sentences.text: Mercury
sentences.text: astronauts
sentences.text: trained
sentences.text: in
sentences.text: a
sentences.text: C-131
sentences.text: Samaritan
sentences.text: aircraft
sentences.text: ,
sentences.text: which
sentences.text: was
sentences.text: dubbed
sentences.text: the
sentences.text: "
sentences.text: Vomit
sentences.text: Comet
sentences.text: "
sentences.text: .
sentences.text: Twin KC-135 Stratotankers were used until December 2004 and have since been retired.
sentences.text: Twin
sentences.text: KC-135
sentences.text: Stratotankers
sentences.text: were
sentences.text: used
sentences.text: until
sentences.text: December
sentences.text: 2004
sentences.text: and
sentences.text: have
sentences.text: since
sentences.text: been
sentences.text: retired
sentences.text: .
sentences.text: One, a KC-135A known as NASA 930, was also used by Universal Pictures and Imagine Entertainment for filming scenes involving weightlessness in the movie Apollo 13; that airplane was retired in 2000 and is now on display at Ellington Field, near the Johnson Space Center.
sentences.text: One
sentences.text: ,
sentences.text: a
sentences.text: KC-135A
sentences.text: known
sentences.text: as
sentences.text: NASA
sentences.text: 930
sentences.text: ,
sentences.text: was
sentences.text: also
sentences.text: used
sentences.text: by
sentences.text: Universal
sentences.text: Pictures
sentences.text: and
sentences.text: Imagine
sentences.text: Entertainment
sentences.text: for
sentences.text: filming
sentences.text: scenes
sentences.text: involving
sentences.text: weightlessness
sentences.text: in
sentences.text: the
sentences.text: movie
sentences.text: Apollo
sentences.text: 13
sentences.text: ;
sentences.text: that
sentences.text: airplane
sentences.text: was
sentences.text: retired
sentences.text: in
sentences.text: 2000
sentences.text: and
sentences.text: is
sentences.text: now
sentences.text: on
sentences.text: display
sentences.text: at
sentences.text: Ellington
sentences.text: Field
sentences.text: ,
sentences.text: near
sentences.text: the
sentences.text: Johnson
sentences.text: Space
sentences.text: Center
sentences.text: .
sentences.text: It is estimated to have flown over 58,000 parabolas.
sentences.text: It
sentences.text: is
sentences.text: estimated
sentences.text: to
sentences.text: have
sentences.text: flown
sentences.text: over
sentences.text: 58,000
sentences.text: parabolas
sentences.text: .
sentences.text: The other (N931NA or NASA 931) made its final flight on October 29, 2004, and is permanently stored in the Pima Air &amp; Space Museum in Tucson, Arizona.
sentences.text: The
sentences.text: other
sentences.text: (
sentences.text: N931NA
sentences.text: or
sentences.text: NASA
sentences.text: 931
sentences.text: )
sentences.text: made
sentences.text: its
sentences.text: final
sentences.text: flight
sentences.text: on
sentences.text: October
sentences.text: 29
sentences.text: ,
sentences.text: 2004
sentences.text: ,
sentences.text: and
sentences.text: is
sentences.text: permanently
sentences.text: stored
sentences.text: in
sentences.text: the
sentences.text: Pima
sentences.text: Air
sentences.text: &amp;
sentences.text: Space
sentences.text: Museum
sentences.text: in
sentences.text: Tucson
sentences.text: ,
sentences.text: Arizona
sentences.text: .
sentences.text: In 2005, NASA replaced the airplane with a McDonnell Douglas C-9B Skytrain II that was formerly owned by KLM Royal Dutch Airlines and the United States Navy.
sentences.text: In
sentences.text: 2005
sentences.text: ,
sentences.text: NASA
sentences.text: replaced
sentences.text: the
sentences.text: airplane
sentences.text: with
sentences.text: a
sentences.text: McDonnell
sentences.text: Douglas
sentences.text: C-9B
sentences.text: Skytrain
sentences.text: II
sentences.text: that
sentences.text: was
sentences.text: formerly
sentences.text: owned
sentences.text: by
sentences.text: KLM
sentences.text: Royal
sentences.text: Dutch
sentences.text: Airlines
sentences.text: and
sentences.text: the
sentences.text: United
sentences.text: States
sentences.text: Navy
sentences.text: .
sentences.text: That same year, the Zero-Gravity Corporation, a commercial parabolic flight operator which offers parabolic flights to both researchers and adventure tourists, began flying parabolic flights for NASA with Boeing 727 jets.
sentences.text: That
sentences.text: same
sentences.text: year
sentences.text: ,
sentences.text: the
sentences.text: Zero-Gravity
sentences.text: Corporation
sentences.text: ,
sentences.text: a
sentences.text: commercial
sentences.text: parabolic
sentences.text: flight
sentences.text: operator
sentences.text: which
sentences.text: offers
sentences.text: parabolic
sentences.text: flights
sentences.text: to
sentences.text: both
sentences.text: researchers
sentences.text: and
sentences.text: adventure
sentences.text: tourists
sentences.text: ,
sentences.text: began
sentences.text: flying
sentences.text: parabolic
sentences.text: flights
sentences.text: for
sentences.text: NASA
sentences.text: with
sentences.text: Boeing
sentences.text: 727
sentences.text: jets
sentences.text: .
sentences.text: Since 1984, the ESA and the CNES have flown similar reduced-gravity missions in a variety of airplanes, including NASA's KC-135, a Caravelle, an Ilyushin IL-76 MDK, and, most recently, an Airbus A300 known as the Zero-G, which is flown out of the Bordeaux-Merignac airport in France.
sentences.text: Since
sentences.text: 1984
sentences.text: ,
sentences.text: the
sentences.text: ESA
sentences.text: and
sentences.text: the
sentences.text: CNES
sentences.text: have
sentences.text: flown
sentences.text: similar
sentences.text: reduced-gravity
sentences.text: missions
sentences.text: in
sentences.text: a
sentences.text: variety
sentences.text: of
sentences.text: airplanes
sentences.text: ,
sentences.text: including
sentences.text: NASA
sentences.text: 's
sentences.text: KC-135
sentences.text: ,
sentences.text: a
sentences.text: Caravelle
sentences.text: ,
sentences.text: an
sentences.text: Ilyushin
sentences.text: IL-76
sentences.text: MDK
sentences.text: ,
sentences.text: and
sentences.text: ,
sentences.text: most
sentences.text: recently
sentences.text: ,
sentences.text: an
sentences.text: Airbus
sentences.text: A300
sentences.text: known
sentences.text: as
sentences.text: the
sentences.text: Zero-G
sentences.text: ,
sentences.text: which
sentences.text: is
sentences.text: flown
sentences.text: out
sentences.text: of
sentences.text: the
sentences.text: Bordeaux-Merignac
sentences.text: airport
sentences.text: in
sentences.text: France
sentences.text: .
sentences.text: In late 2004, Zero Gravity Corporation became the first and only company in the United States to offer parabolic weightlessness flights to the general public.
sentences.text: In
sentences.text: late
sentences.text: 2004
sentences.text: ,
sentences.text: Zero
sentences.text: Gravity
sentences.text: Corporation
sentences.text: became
sentences.text: the
sentences.text: first
sentences.text: and
sentences.text: only
sentences.text: company
sentences.text: in
sentences.text: the
sentences.text: United
sentences.text: States
sentences.text: to
sentences.text: offer
sentences.text: parabolic
sentences.text: weightlessness
sentences.text: flights
sentences.text: to
sentences.text: the
sentences.text: general
sentences.text: public
sentences.text: .
sentences.text: Each flight consists of around 15 parabolas, including simulations of the gravity levels of the Moon and Mars, as well as complete weightlessness.
sentences.text: Each
sentences.text: flight
sentences.text: consists
sentences.text: of
sentences.text: around
sentences.text: 15
sentences.text: parabolas
sentences.text: ,
sentences.text: including
sentences.text: simulations
sentences.text: of
sentences.text: the
sentences.text: gravity
sentences.text: levels
sentences.text: of
sentences.text: the
sentences.text: Moon
sentences.text: and
sentences.text: Mars
sentences.text: ,
sentences.text: as
sentences.text: well
sentences.text: as
sentences.text: complete
sentences.text: weightlessness
sentences.text: .
sentences.text: The first zero G plane in Latin America is a T-39 Sabreliner nicknamed CONDOR, operated by the Ecuadorian space agency and the Ecuadorian Air Force.
sentences.text: The
sentences.text: first
sentences.text: zero
sentences.text: G
sentences.text: plane
sentences.text: in
sentences.text: Latin
sentences.text: America
sentences.text: is
sentences.text: a
sentences.text: T-39
sentences.text: Sabreliner
sentences.text: nicknamed
sentences.text: CONDOR
sentences.text: ,
sentences.text: operated
sentences.text: by
sentences.text: the
sentences.text: Ecuadorian
sentences.text: space
sentences.text: agency
sentences.text: and
sentences.text: the
sentences.text: Ecuadorian
sentences.text: Air
sentences.text: Force
sentences.text: .
sentences.text: It has operated since May, 2008.
sentences.text: It
sentences.text: has
sentences.text: operated
sentences.text: since
sentences.text: May
sentences.text: ,
sentences.text: 2008
sentences.text: .
sentences.text: On June 19 2008, this plane carried 7 year old Jules Nader as he set the Guinness world record for the youngest human being flying in microgravity.
sentences.text: On
sentences.text: June
sentences.text: 19
sentences.text: 2008
sentences.text: ,
sentences.text: this
sentences.text: plane
sentences.text: carried
sentences.text: 7
sentences.text: year
sentences.text: old
sentences.text: Jules
sentences.text: Nader
sentences.text: as
sentences.text: he
sentences.text: set
sentences.text: the
sentences.text: Guinness
sentences.text: world
sentences.text: record
sentences.text: for
sentences.text: the
sentences.text: youngest
sentences.text: human
sentences.text: being
sentences.text: flying
sentences.text: in
sentences.text: microgravity
sentences.text: .
sentences.text: Nader worked on an hydrodynamics experiment designed by his brother.
sentences.text: Nader
sentences.text: worked
sentences.text: on
sentences.text: an
sentences.text: hydrodynamics
sentences.text: experiment
sentences.text: designed
sentences.text: by
sentences.text: his
sentences.text: brother
sentences.text: .
sentences.text: According to former Reduced Gravity Research Program director John Yaniec, anxiety contributes most to passengers' airsickness.
sentences.text: According
sentences.text: to
sentences.text: former
sentences.text: Reduced
sentences.text: Gravity
sentences.text: Research
sentences.text: Program
sentences.text: director
sentences.text: John
sentences.text: Yaniec
sentences.text: ,
sentences.text: anxiety
sentences.text: contributes
sentences.text: most
sentences.text: to
sentences.text: passengers
sentences.text: '
sentences.text: airsickness
sentences.text: .
sentences.text: Yaniec gives a rough estimate that of passengers, " one third [become] violently ill, the next third moderately ill, and the final third not at all . "
sentences.text: Yaniec
sentences.text: gives
sentences.text: a
sentences.text: rough
sentences.text: estimate
sentences.text: that
sentences.text: of
sentences.text: passengers
sentences.text: ,
sentences.text: "
sentences.text: one
sentences.text: third
sentences.text: [
sentences.text: become
sentences.text: ]
sentences.text: violently
sentences.text: ill
sentences.text: ,
sentences.text: the
sentences.text: next
sentences.text: third
sentences.text: moderately
sentences.text: ill
sentences.text: ,
sentences.text: and
sentences.text: the
sentences.text: final
sentences.text: third
sentences.text: not
sentences.text: at
sentences.text: all
sentences.text: .
sentences.text: "
sentences.text: Vomiting is referred to as a " kill ".
sentences.text: Vomiting
sentences.text: is
sentences.text: referred
sentences.text: to
sentences.text: as
sentences.text: a
sentences.text: "
sentences.text: kill
sentences.text: "
sentences.text: .
sentences.text: Commercial operator Zero Gravity Corporation claims their tourist rides with up to 15 parabolas are much less traumatic compared to the typical research flight with 40 80 parabolas.
sentences.text: Commercial
sentences.text: operator
sentences.text: Zero
sentences.text: Gravity
sentences.text: Corporation
sentences.text: claims
sentences.text: their
sentences.text: tourist
sentences.text: rides
sentences.text: with
sentences.text: up
sentences.text: to
sentences.text: 15
sentences.text: parabolas
sentences.text: are
sentences.text: much
sentences.text: less
sentences.text: traumatic
sentences.text: compared
sentences.text: to
sentences.text: the
sentences.text: typical
sentences.text: research
sentences.text: flight
sentences.text: with
sentences.text: 40
sentences.text: 80
sentences.text: parabolas
sentences.text: .
sentences.text: Vomit comet may also refer to any other form of transportation on which riders are said to become nauseated or seasick, such as a bus that transports late-night revelers or a fast boat such as a high-speed catamaran . .
sentences.text: Vomit
sentences.text: comet
sentences.text: may
sentences.text: also
sentences.text: refer
sentences.text: to
sentences.text: any
sentences.text: other
sentences.text: form
sentences.text: of
sentences.text: transportation
sentences.text: on
sentences.text: which
sentences.text: riders
sentences.text: are
sentences.text: said
sentences.text: to
sentences.text: become
sentences.text: nauseated
sentences.text: or
sentences.text: seasick
sentences.text: ,
sentences.text: such
sentences.text: as
sentences.text: a
sentences.text: bus
sentences.text: that
sentences.text: transports
sentences.text: late-night
sentences.text: revelers
sentences.text: or
sentences.text: a
sentences.text: fast
sentences.text: boat
sentences.text: such
sentences.text: as
sentences.text: a
sentences.text: high-speed
sentences.text: catamaran
sentences.text: .
sentences.text: .
text: Vomit Comet is a nickname for any airplane that briefly provides a nearly weightless environment in which to train astronauts, conduct research, and film motion pictures. Versions of such airplanes have in the past been operated by NASA's Reduced Gravity Research Program since 1973, where the unofficial nickname originated. NASA then adopted the official nickname Weightless Wonder, for publication. The airplane produces weightlessness by following a parabolic vertical flight path. A parabolic flight path is the same path that would be taken by an object in free fall, such as a cannonball fired into the air. As a result, the aircraft does not exert any g-force on its contents, so the contents have zero apparent weight relative to the aircraft. The aircraft heads upward at an angle of 45 degrees. As soon as the pilot begins the rotation into the parabolic trajectory, weightlessness is achieved. This lasts all the way " up-and-over the hump ", until the craft reaches a declined angle of 30 degrees. At this point, the craft has lost a significant amount of altitude, and must begin to pull into a hard upward turn. The forces are then roughly twice that of gravity on the way down, at the bottom, and up again. This lasts all the way until the aircraft is again halfway up its upward trajectory, and the pilot again initiates the zero-g parabola. In general, this aircraft is used to train astronauts in zero-g maneuvers, giving them about 25 seconds of weightlessness out of 65 seconds of flight. This often produces nausea due to airsickness, especially in novices, giving the plane its nickname. NASA has flown parabolic flights on various aircraft for many years. In 1959, Project Mercury astronauts trained in a C-131 Samaritan aircraft, which was dubbed the " Vomit Comet ". Twin KC-135 Stratotankers were used until December 2004 and have since been retired. One, a KC-135A known as NASA 930, was also used by Universal Pictures and Imagine Entertainment for filming scenes involving weightlessness in the movie Apollo 13; that airplane was retired in 2000 and is now on display at Ellington Field, near the Johnson Space Center. It is estimated to have flown over 58,000 parabolas. The other (N931NA or NASA 931) made its final flight on October 29, 2004, and is permanently stored in the Pima Air &amp; Space Museum in Tucson, Arizona. In 2005, NASA replaced the airplane with a McDonnell Douglas C-9B Skytrain II that was formerly owned by KLM Royal Dutch Airlines and the United States Navy. That same year, the Zero-Gravity Corporation, a commercial parabolic flight operator which offers parabolic flights to both researchers and adventure tourists, began flying parabolic flights for NASA with Boeing 727 jets. Since 1984, the ESA and the CNES have flown similar reduced-gravity missions in a variety of airplanes, including NASA's KC-135, a Caravelle, an Ilyushin IL-76 MDK, and, most recently, an Airbus A300 known as the Zero-G, which is flown out of the Bordeaux-Merignac airport in France. In late 2004, Zero Gravity Corporation became the first and only company in the United States to offer parabolic weightlessness flights to the general public. Each flight consists of around 15 parabolas, including simulations of the gravity levels of the Moon and Mars, as well as complete weightlessness. The first zero G plane in Latin America is a T-39 Sabreliner nicknamed CONDOR, operated by the Ecuadorian space agency and the Ecuadorian Air Force. It has operated since May, 2008. On June 19 2008, this plane carried 7 year old Jules Nader as he set the Guinness world record for the youngest human being flying in microgravity. Nader worked on an hydrodynamics experiment designed by his brother. According to former Reduced Gravity Research Program director John Yaniec, anxiety contributes most to passengers' airsickness. Yaniec gives a rough estimate that of passengers, " one third [become] violently ill, the next third moderately ill, and the final third not at all . " Vomiting is referred to as a " kill ". Commercial operator Zero Gravity Corporation claims their tourist rides with up to 15 parabolas are much less traumatic compared to the typical research flight with 40 80 parabolas. Vomit comet may also refer to any other form of transportation on which riders are said to become nauseated or seasick, such as a bus that transports late-night revelers or a fast boat such as a high-speed catamaran . .