The observatory’s Near-Infrared Spectrograph (NIRSpec) instrument observed Uranus for almost a full rotation just over a year ago, showing how the planet’s ionosphere, a thin layer in the planet’s ...

Scientists identify exoplanet candidate HD 137010 b, a possible Earth-size world orbiting a Sun-like star 146 light-years away ...

Witness the Moon’s crimson transformation and the Sun’s golden ring as two extraordinary celestial alignments grace the Earth’s atmosphere.

Jupiter on March 1 transits (reaches its high point) just 20 minutes after Sirius does, but nearly 40° higher. Castor, Procyon and Pollux all transit in quick succession between 50 and 61 minutes ...

Who’s ready for a “planet parade”? The last planetary alignment was in August 2025, when six planets aligned and four were bright enough to be seen without a telescope. Next week, Mercury, Venus, ...

Breaking space news, the latest updates on rocket launches, skywatching events and more! You are now subscribed Your newsletter sign-up was successful Want to add more newsletters? Delivered daily ...

Few storytelling devices have served Star Trek as reliably—or as imaginatively—as time travel. From its earliest days, the ...