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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.

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.

This asteroid and comet look similar

Radar images of close-passing large asteroid 2014 JO25, which swept near last week, show it looks a lot like Comet 67P/Churyumov–Gerasimenko, which was explored by the Rosetta spacecraft.

How our Milky Way looks from space

Composite of 2 spiral galaxies – offered in celebration of the Hubble Space Telescope’s 27th birthday today – shows how our Milky Way galaxy might look if we were outside it.

Earth and moon between Saturn’s rings

Cassini spacecraft orbiting Saturn obtained this new image April 12. The craft was 870 million miles (1.4 billion km) from Earth.

Cassini’s final encounter with Titan

Cassini’s final closest approach to Saturn’s moon Titan is scheduled for April 21 at 11:08 p.m. PDT (2:08 a.m. EDT or 6:08 UTC on April 22).

Cassini to begin its Grand Finale

The glorious Cassini spacecraft – now nearly out of fuel – will make the 1st in a daring series of dives through the gap between Saturn and its rings on April 26.

Video: Cassini’s final crazy engineering

During Cassini’s close pass of Titan on April 21-22, Titan’s gravity will bend Cassini’s orbit around Saturn, shrinking it slightly, so that instead of passing just outside the rings, the spacecraft will begin its Grand Finale dives just inside the rings. Wow!

Photos of close asteroid 2014 JO25

Large asteroid 2014 JO25 safely passed Earth on April 19, 2017 at some 1,098,733 miles (1,768,239 km) or about 4.6 times the distance from Earth to the moon. Images from the EarthSky community here.

Asteroid 2014 JO25 bigger than expected

It’s coming closer today than any asteroid this large since 2004. It came into view of small telescopes a few hours ago. Early radar observations indicate it’s bigger than we thought.

Green moon on April 20, 2017? Nah

The green moon rumor started in 2016. Now it’s back. It’s a joke, y’all. We’re not going to have a green moon on April 20, 2017. This joke has its roots (ahem) in cannabis culture.

Ocean worlds beyond Earth

Earth is an ocean planet. Astronomers are realizing that ocean worlds are all around us in space. New ScienceCast video from NASA.

Who needs dark energy?

Dark energy is thought to be the driver for the expansion of the universe. But do we need dark energy to account for an expanding universe?

Watch space debris conference online

ESA invites you to watch the opening address and more from the European Conference on Space Debris. It’ll begin April 18 at 09:30 CEST.

Is there life on Saturn’s moon?

A form of chemical energy that can support life appears to exist on Saturn’s moon Enceladus. 

More ways sun storms can disrupt things

Scientists are learning more about the way storms on the sun can disrupt our communications satellites and ground-based electric grids.

First-ever image of dark matter?

The scientists say their image, which combines images from more than 23,000 galaxy pairs, confirms dark matter’s existence. Will other astronomers agree?

Jupiter has a Great Cold Spot

The newly discovered Great Cold Spot on Jupiter rivals the scale of the planet’s Great Red Spot. It’s thought to be driven by powerful energies from auroras at Jupiter’s poles.

New views of Uranus’ auroras and rings

NASA just released a new composite image combining Voyager 2 and Hubble data to show both the rings and auroras of Uranus.

The perilous process of star birth

It isn’t a supernova or dying star. It’s an explosion during star birth and provides insights into the sometimes-fierce relationship among sibling stars.