21–40 of 53 results
Seismometer on NASA's Insight lander

Solar System

What the First Marsquake Means for NASA's Insight

After two months, InSight’s seismometer has picked up the first rumblings in Martian soil. Turns out marsquakes may be less frequent than thought.

ExoMars Trace Gas Orbiter looks for methane (art)

Solar System

The Martian Methane Mystery Continues

The most advanced instrument ever sent to Mars to study its atmosphere has failed to find any methane after months of searching.

Mars Express

Solar System

New Study Confirms Methane on Mars – But It’s Not Definitive

Independent methane detections in the Martian atmosphere by the Curiosity rover and Mars Express orbiter add confusion to a convoluted story.

Ryugu closeup

Space Missions

Hayabusa 2 Finds Asteroid Ryugu Is Dark & Dry

Hayabusa 2’s asteroid Ryugu has some unexpected characteristics. In particular, its dry surface could spell trouble for current theories about how Earth obtained its water.

Asteroid Bennu

Solar System

Bumpy Road Ahead For NASA’s Osiris-REX

Asteroid Bennu is turning out to be a hazardous place for the NASA spacecraft to sample: It has uneven, rugged terrain and occasionally even hurls rocks into space.

Craters on the Moon, by age

Solar System

Asteroid Impacts Increased 290 Million Years Ago, Lunar Craters Reveal

Researchers have estimated the ages of craters on the lunar surface, finding that the rate of large impacts nearly tripled 290 million years ago — an increase that might be ongoing.

Cassini at Saturn

Solar System

Four Things We Now Know About Saturn

Cassini gave an epic final show, going where no space probe had gone before. Here are a few interesting things we learned from that finale.

Portrayal of 'Oumuamua (1I/2017 U1)

Solar System

'Oumuamua’s Story Keeps Spinning

Two new studies question the cometary nature of 'Oumuamua, our first interstellar visitor, and where in the Galaxy it might have come from.

'Oumuamua

Solar System

'Oumuamua Was a Comet After All

Researchers have found that 'Oumuamua — the first confirmed object to enter the solar system from interstellar space — was a comet, releasing just enough gas to subtly change its course.

Sedna

Solar System

No Planet Nine? Small-body Pile-up Could Explain Odd Orbits

New research shows that interactions between small objects beyond Neptune’s orbit —and not a hypothetical Planet Nine — could be the reason some far-flung solar system objects “detach” from their original orbits.

Discovery images of asteroid 2015 BZ509

Solar System

Did This Wrong-way Asteroid Come from Beyond the Solar System?

An intriguing asteroid was spotted traveling backwards around Jupiter back in 2015. Now a team of researchers think it could have formed around another star.

The Milky Way, cropped

Milky Way

Amateurs Take Huge Panoramic View of the Milky Way — Without a Telescope

This is what the largest available image of the Milky Way using only off-the-shelf photographic equipment looks like.

Terrestrial Synestia (art)

Solar System

Could a Giant Impact Have Vaporized Earth to Create the Moon?

In a new twist on the giant impact theory, a new idea posits that the Moon might have formed from the vaporized remains of Earth after an epic collision with another planet-sized body.

Stellar Science

Amateur Astronomer Captures Supernova’s First Light

In 2016 an amateur astronomer was testing his camera — and captured the first flash of a supernova.

Jupiter's Great Red Spot

Solar System

Juno Probes Depths of the Great Red Spot

NASA’s Juno spacecraft peeked under the clouds of the most iconic weather feature in the solar system, Jupiter’s Great Red Spot, revealing a complex structure deep below the surface.

Small Magellanic Cloud at radio wavelengths

Galaxies

New Telescope Sees Galaxy Down to Its Atoms

Astronomers have obtained the most detailed radio image of hydrogen gas in a neighboring galaxy, revealing its structures with more precision than ever before.

The Milky Way from Australia

History and Sky Lore

Aboriginal Australians Observed Red Giant Stars’ Variability

New interpretations of oral accounts by Aboriginal Australians show that they included references to the variability of red giants Antares, Betelgeuse, and Aldebaran.

Moon's ancient atmosphere

Solar System

Ancient Moon Had Atmosphere Made of Volcano Smoke

Roughly 3.5 billion years ago huge volcanoes released enough gas to cover the Moon with a thin atmosphere that was visible from Earth.

People, Places, and Events

2017 Nobel Goes to Gravitational Waves

Three American physicists have received the Nobel Prize in physics for their contributions to the discovery of gravitational waves.

Solar Eclipse 2017

Astronomy and Society

Millions of Americans Viewed August Solar Eclipse

The 2017 solar eclipse could easily be the most watched event in US history. Can we learn something from it?

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