The year 2018 was a good one for astronomers. Mars, asteroids, and the outer Solar System had the spotlight more than once. Gaia is bringing the Milky Way into focus, and Hubble found the most distant star ever seen. Here are my choices for the top astronomy stories of 2018.
It's been a year of discoveries, celestial spectacles, and new developments, though tempered by some sadness, for those interested in astronomy and space. Here are my choices for the notable events in 2018.
Imagine midnight on December 31 – fireworks, friendship and celebration greet a new year. But only if you follow the Gregorian calendar. In the past, a year often didn't start on January 1, and for nearly two billion people it still doesn't. So when does a new year begin?
In the Harry Potter books there are a number of characters that are named for stars and constellations. You can find out more about these stars - and for those that don't know the books, there's a bit of background on the characters.
We no longer see the heavens as perfect and the stars as eternal and unchanging. Even the Universe had a beginning, and everything that we observe changes and evolves. Many of these changes involve cosmic collisions.