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The last of Hubble’s Frontier Fields
With a final observation of remote galaxy cluster Abell 370, the Hubble Space Telescope's mind-stretching Frontier Fields program came to an end.
May 7, 2017
X-ray tsunami in Perseus galaxy cluster
Not so very long ago or far away in astronomical terms, a near-miss between titanic galaxy clusters might have set into motion an immense wave of hot gas.
May 5, 2017
Video: Close-approach comets
ScienceCast video from NASA about comets passing near Earth in 2017 and 2018, and about how scientists are studying them. Plus photos from our community!
May 3, 2017
Cassini finds ‘big empty’ near Saturn
It's not totally empty, but the space between Saturn and its rings is much emptier than scientists expected. Cassini will make its 2nd dive through this gap at 3:38 p.m. EDT (19:38 UTC) today.
May 2, 2017
Simulating the smallest ring world
Chariklo is the smallest space body known to have rings. A new supercomputer simulation by Japanese researchers suggests a life expectancy for the rings of only 1 to 100 years.
April 30, 2017
Cassini dives between Saturn and rings
The Cassini spacecraft made the first-ever dive through the narrow gap between the planet Saturn and its rings on Wednesday.
April 29, 2017
How Kepler saw Neptune
New video from NASA depicting the observations of our solar system's 8th planet, Neptune, by the famous planet-hunting Kepler telescope.
April 29, 2017
Landslides on dwarf planet Ceres
A recent study shows that landslides are common on the dwarf planet Ceres and reinforces the idea that Ceres has a lot of water ice.
April 28, 2017
New Project Skyglow video and giveaway
The guys at Project Skyglow have done some amazing videos, and they have a new book out. It's not too late to enter their giveaway, honoring International Dark Sky Week.
April 28, 2017
Cassini completes final, fateful Titan flyby
This was Cassini's 127th Titan flyby. The craft passed at an altitude of about 608 miles (979 km) above the moon's surface. Cassini is now in position for its daring Grand Finale.
April 24, 2017
