With Mercury joining the show, all seven of Earth’s celestial neighbors will be present at dusk this week. By Katrina Miller Astute skywatchers may have already seen the striking line of planets ...

Astrotourism is growing in popularity as more people seek out dark skies to experience celestial wonders. National parks and designated Dark Sky Places offer excellent opportunities for stargazing and ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. February ends with ...