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Mercury is tectonically active
New findings suggest Mercury is contracting and experiences ongoing "mercuryquakes."
September 29, 2016
Are we in a sixth mass extinction?
This short video puts modern extinctions in context by comparing them with Earth's 5 previous mass extinctions.
September 29, 2016
Rosetta spacecraft selfie with comet
An otherworldly take on an earthly trend, as Rosetta posed with its comet, 67P/Churyumov–Gerasimenko, in 2014.
September 29, 2016
Shark and tuna convergent evolution
Lamnid sharks and tuna have similar physical traits that make them top ocean predators. But, a new study says, they took very different evolutionary paths.
September 28, 2016
Moon and Mercury on September 29
Mercury and the moon get close on the morning of September 29! They're easiest to see from the Northern Hemisphere or southern tropics.
September 28, 2016
Possible water plumes spotted on Europa
Water plumes erupting on Jupiter's moon Europa might make it easier to investigate whether life exists in the warm ocean believed to be deep beneath its icy surface.
September 27, 2016
Moon and Mercury shortly before sunrise
September 28 is also the day of Mercury's greatest elongation, when the planet will be 18 degrees west of the sun on our sky's dome. Look shortly before sunup.
September 27, 2016
New theory on why time advances
Why does time flow inexorably toward the future? A Berkeley physicist proposes that time is expanding because space is expanding.
September 26, 2016
Last hurrah of sunlike star
New Hubble image shows the demise of a sunlike star. Our own sun will also burn out and shroud itself with stellar debris, but not for another 5 billion years.
September 26, 2016
Cassini begins epic final year at Saturn
The spacecraft will plunge repeatedly between Saturn and its rings, and finally execute a headlong plummet into the body of Saturn itself.
September 26, 2016
