Instead of pulling galaxies in our universe together, gravity seems to be driving them apart. How can gravity be repulsive, when our everyday experience shows it’s attractive? To explain it, we need dark energy.
Posts by EarthSky Voices
Sharks are incredibly unlikely to bite you. They’re even less likely to kill you. However, we remain fascinated with their ability – and occasional proclivity – to do just that.
The word for it is “petrichor.” It’s the name of an oil that’s released from Earth into the air before rain begins to fall.
If you had to name a dinosaur, you might say Brontosaurus. But, since 1903, experts have said that Brontosaurus isn’t a separate species. Now Bronto is back!
The average U.S. student has played roughly 10,000 hours of games by the end of high school – only a little less time than the hours spent in school.
Living in ice is no easy feat, but ice worms make it work. Part of the secret to their survival on glaciers lies in a symbiosis between worm and bacteria.
A new study shows that not only has Antarctica’s ice shelf volume gone down, but losses have accelerated over the past decade.
As glaciers melt, streams carry more mercury into the ocean, increasing risk of mercury poisoning in humans and wildlife in Greenland and in adjacent coastal countries.
The brightness of this unusual nova has gone up and down and now back up again. EarthSky friend Tom Wildoner tells you how to see the nova before it’s gone!
India’s Mars Orbiter Mission (MOM) was expected to end on March 24. But it turns out that the probe could have another 6 months of life left in it.