Now let's fast-forward to the 1990s when those two teams of astronomers I mentioned at the outset were inspired by this reasoning to measure the rate at which the expansion has been slowing.
Tehdään pikakelaus 1990-luvulle, jolloin kaksi mainitsemaani astronomiryhmää innostui ajatuksesta mittaamaan nopeuden, jolla laajeneminen on hidastunut.