After three and a half weeks in space filled with engine burns, lunar flybys and stunning views of the earth and the moon, NASA's Orion spacecraft is home.
Those older telescopes had to focus on nebulae, where the interstellar gas is most concentrated (a familiar one, visible through binoculars, is the gas cloud around the stars that make up Orion's sword).
If scientists had to read or write them out in full when they were discussing things like the molecules of water in a swimming pool or the distance to the Orion nebula, it would take up pages of books.