Hubble Space Telescope finds galaxy with weirdly little dark matter By Rahul Rao Astronomers may not know what dark matter is, but they do know that galaxies are supposed to contain a lot of the shadowy, invisible substance.
When this star blows, its planets will be turned into enormous pinballs By Ben Turner The researchers created a computer model to predict the ways the planets would scatter, finding that slight tweaks to starting positions lead to vastly different outcomes
Plasma wind tunnel annihilates satellite model in atmospheric reentry test By Mindy Weisberger Satellite parts that melt away during reentry reduce the risk of space debris impacts on Earth, a new video demonstrates.
Huge new catalog of ultrabright 'fast radio bursts' may shed light on the structure of the universe By Doris Elin Urrutia A big new sample of fast radio bursts is allowing scientists to ask big-picture questions about the cosmos.
China's moon rocks are ready to be loaned out for science research By Andrew Jones China's Chang'e 5 spacecraft returned fresh moon rock samples late last year, but the main science of the mission is still just getting underway.
'Giant arc' stretching 3.3 billion light-years across the cosmos shouldn't exist By Adam Mann Colossal arc of distant galaxies makes astronomers question some of their most cherished principles about the cosmos.
Venus has a gooey flowing mantle jostling crust chunks on its surface By Doris Elin Urrutia Venus may still be geologically active today, which could mean that Earth's planetary sibling is a good place for scientists to learn about early Earth and faraway worlds.
The edge of the solar system is a blob, 3D map reveals By Brandon Specktor Scientists used solar wind to make the first 3D map of the heliosphere, which protects Earth from deadly cosmic radiation.
Famous Stephen Hawking theory about black holes confirmed By Ben Turner Physicists analyzed data from the first ever gravitational waves detected to prove Hawking's theory, and think that even more could be discovered from studying the ripples in space-time.
Record breaker: Scientists spot earliest known supermassive black hole 'storm' By Mike Wall Scientists have found the earliest known "storm" generated by a supermassive black hole, a discovery that could shed considerable light on the coevolution of galaxies and their central black holes.
Summer solstice 2021 on Father's Day, the longest of the year, marks Earth's changing seasons By Samantha Mathewson The official start of summer kicks off in the Northern Hemisphere today (June 20) to make Father's Day the longest day of the year.
100,000 star nurseries mapped in first-of-its-kind survey By Ben Turner The researchers say that they want to use the survey to better understand our own place in the universe.
US Postal Service releases 'Sun Science' stamps with NASA imagery By Robert Z. Pearlman USPS released "Sun Science," a collection of 10 colorful stamps celebrating the study of heliophysics using imagery from NASA's Solar Dynamics Observatory.
This week on the Space.com forums: Questioning dark matter, exploring space and a last chance to win! By Mohamed Mohammed The community ponders about the most important questions in space exploration and interrogates dark matter.
Dark matter is putting the brakes on our Milky Way galaxy's spin By Daisy Dobrijevic The rotation of the Milky Way bar has slowed by almost a quarter since its formation.
Incredibly powerful megaflares from young stars are common, study shows By Meghan Bartels Young stars can release flares more powerful than our sun's largest on record once a week, according to a massive new analysis of stellar activity.
Mystery solved? Dust cloud caused Betelgeuse star's weird dimming, study finds By Mike Wall Astronomers may have solved the mystery of Betelgeuse's bizarre brightness drop.
Does the moon rotate? By Nola Taylor Redd Yes, the moon rotates on its axis. The moon's rate of rotation nearly matches its orbital period, which keep the same side facing Earth.
Tantalizing Pluto views suggest active surface but won't be seen again for 161 years By Meghan Bartels For a brief moment in time in July 2018, the solar system aligned to show Earth the fully sunlit disk of Pluto, an arrangement that won't occur again for 161 years.
