The full moon of September, called the Harvest Moon, will grace the skies on Sept. 24, just two days after the autumn equinox.
See photos of Comet 21P/Giacobini-Zinner and the naked-eye comet 46P/Wirtanen, which will swing around the sun in September and December.
Galaxies use powerful winds to save themselves from early deaths. And researchers just spotted one from just a billion years after the Big Bang.
Jocelyn Bell Burnell shocked the physics world when she discovered radio pulsars. But the Nobel committee gave the 1974 award to her supervisor instead.
A bright-green comet is making an appearance in the night sky this month. Comet 21P/Giacobini-Zinner is now visible with binoculars and telescopes. Meanwhile, an even brighter comet is heading our way and will become visible to the naked eye in December.
The Russian Soyuz spacecraft responsible for last week's pressure drop aboard the International Space Station may have received its wounds here on Earth, on the grounds of its manufacturer, according to news reports.
Why are black holes so hard to study? Astrophysicist Paul Sutter digs into this question in a new episode of "Ask a Spaceman."
New footage from the International Space Station captured Tropical Storm Gordon as it grew stronger over the northern Gulf of Mexico.
If you know your way around a chemistry lab, you could help humanity set up shop on Mars — and make some serious cash in the process.
The TRAPPIST-1 system boasts seven rocky worlds in the habitable zone of their star. New research reveals that these worlds may be rich in volatiles such as water, as well.
NASA's low-on-fuel Kepler space telescope, which has discovered more than 2,650 alien planets to date, has awoken from yet another slumber and begun making science observations again, agency officials announced today (Sept. 5).
See amazing images of the night sky and cosmos in Space.com's gallery of cosmic images posted in July 2018.
A congressionally mandated report published today (Sept. 5) by the premier science advisory group in the United States has found that NASA should focus its exoplanet research budget on large space- and ground-based telescopes.
See amazing images of the night sky and cosmos in Space.com's gallery of cosmic images posted in June 2018.
See amazing images of the night sky and cosmos in Space.com's gallery of cosmic images posted in May 2018.
That's no moon — it's an asteroid.
The dramatic neutron-star merger that astronomers observed in August 2017 generated a jet of material that seemed to move four times faster than light, a new study reports.
The Mars Ice House is the winning design from NASA's 2015 Centennial Challenge for a 3D-printed habitat for future human settlers on Mars. See what it would be like to live in the Mars Ice House with this visual tour.
After a catastrophic fire blazed through the National Museum of Brazil on Sunday (Sept. 2), destroying many of the institution's 20 million artifacts, the museum's meteorites were some of the few relics left standing.
Here's a guide to the major astronomical events of the next year, as well as space launches and milestones for spacecrafts already in travel.