A doomed planet orbiting an aging star has been observed for the first time. Find out what this discovery can contribute to our search for life on other worlds.
Dark energy is the term scientists use to describe the cause of the accelerated expansion of the universe. Find out how a new analysis provides its most precise measurement yet.
The dimming of Betelgeuse, a bright red star, excited stargazers last year. Find out how the Hubble Space Telescope helped explain what happened.(4:45 min read)