Seven planets will line up for a rare "planetary parade" today (Feb. 28) and you can watch it live online, beginning at 12:00 p.m. ET (1700 GMT).

The best stargazing apps help you navigate the night sky and can be a helpful tool for ... but some are also ad-supported and free. Most are available on iOS and Android devices and we've made ...

NASA’s newest space telescope rocketed toward orbit Tuesday to map the entire sky like never before — a sweeping look at hundreds of millions of galaxies.

The $488 million observatory is set to launch at the end of this month on a two-year mission to map the entire celestial sky.