system
Given the following post, respond as if you're commenting on Reddit:
human
eli5: How can airplanes have WiFi?

Normally, WiFi in homes is tethered to a grounded connection right? How is it possible to "transmit" the Internet to a moving plane?
gpt
There are two types of in-flight WiFi. The first type, for example GoGo Inflight, uses a high powered antenna to connect to ground-based cell phone towers. Cell towers are fairly limited in speed, especially the long-range types that can reach an airplane in flight.

The second type, for example ViaSat, uses a satellite receiver dish, like the kind you might have at home for satellite TV or internet, to connect to a satellite. Most satellites have a lot of bandwidth available so speed isn't really an issue, however the receivers are harder to install on a moving plane than a stationary dish at home. A lot of airlines are moving towards this type because it allows for higher speeds, which their customers will appreciate more.