scientist articles
Who discovered the Moon has craters?
What does an astronomer measure?
What kind of scientists work for NASA?
What were Percival Lowell's observations on Mars?
What is Edwin Hubble remembered for?
Who thought there were canals on Mars?
What's the main reason that scientists study asteroids?
Why are scientists concerned with finding Earth-like planets?
What equipment do scientists use to study galaxies?
How do scientists count stars?
How do scientists discover other planets around their own stars?
How do scientists know how far away stars are?
How do scientists determine the distance to the furthest stars and galaxies?
