1–20 of 957 results
View of Gale Crater from top of pediment

Solar System

Evidence Hints at Ancient Life on Mars

Scientists have found a chemical signature that hints at ancient life on Mars. But other possible explanations remain.

Mare Orientale gravity map

Explore the Night with Bob King

Set Your Sights on This Lunar Bull’s-Eye

Go ahead, live on the edge: Grab your chance this month to see Mare Orientale, one of the most spectacular lunar seas most people have never seen.

Asteroid makes close approach

Celestial News & Events

Watch an Asteroid Race Across the Sky

The kilometer-wide, potentially hazardous asteroid 1994 PC1 will fly past Earth on January 18th. Good news on two counts: It won't hit us, and it's bright enough to see in a 4-inch telescope.

Enceladus's plumes

Solar System

Do the Plumes from Saturn’s Icy Moon Reach Down to Its Ocean?

The plumes erupting from Saturn's moon Enceladus may originate in slush in the moon's icy crust rather than its deep, subsurface ocean.

Comet 19P/Borrelly on Dec. 30, 2021

Explore the Night with Bob King

Comet-seeking on Cold, Crunchy Nights

Did the recent apparition of Comet Leonard whet your appetite for more of these beautiful unpredictables? Here are five more you can see with your telescope this season.

Ryugu sample

Solar System

Samples from Asteroid Ryugu Are Most Primitive Material We've Found

The material that the Hayabusa 2 spacecraft returned from asteroid Ryugu is the most pristine sample we've ever gotten our hands on.

Artist's concept of probe above Alfven surface

Solar System

“Humanity Has ‘Touched’ the Sun”

On its eighth close pass, NASA’s record-breaking Parker Solar Probe entered our star’s atmosphere and “touched” the surface of the Sun.

Explore the Night with Bob King

Precious Hours with the Geminids

At first glance, the annual Geminid meteor shower appears to be on a collision course with a bright Moon. But a closer look reveals a happy window of dark skies.

Comet Leonard meets M3

Celestial News & Events

See Comet Leonard at its Best

The year's brightest comet is now on display in the predawn sky this week and next. Here's how to find it.

NASA's DART mission

Solar System

NASA’s DART Mission Launches for Head-on Collision with an Asteroid

The first-ever planetary defense mission is now on its way to the asteroid Didymos and its moon, Dimorphos.

Portrayal of 'Oumuamua (1I/2017 U1)

Solar System

Can This Near-Earth Asteroid Help Us Understand the First Interstellar Visitor?

Astronomers have observed an object like ‘Oumuamua — but unlike the first known interstellar visitor, this one is in the solar system.

Chipping the Moon

Solar System

Has a Stray Piece of the Moon Become a Quasi-satellite of Earth?

A quasi-satellite of Earth, named Kamoʻoalewa, might actually be a chip off our Moon.

Twisted glass slab

Solar System

Did a Comet Explode Over South America 12,000 Years Ago?

Huge chunks and twisted slabs of dark glass are strewn across a patch of the Chilean Atacama Desert. Do they have a cosmic origin?

Venusian volcano Idunn Mons in radar data

Solar System

The Case for an Active Volcano on Venus

After decades of studying Venus, many questions remain about our planetary next-door neighbor. One question has particularly intrigued astronomers: which, if any, of Venus’s 1,600 volcanoes are still active?

Jupiter's Great Red Spot

Solar System

The Roots of Jupiter’s Great Red Spot Run Deep

NASA’s Juno mission has obtained measurements that finally say just how deep the Great Red Spot goes.

Earth and Uranus compared

Explore the Night with Bob King

Uranus Queues Up for Opposition

Journey to a remote planet then double back to check in on the latest stirrings of Comet 29P/Schwassmann-Wachmann before touching the finger of dawn.

Jupiter impact flash Oct. 15, 2021

Explore the Night with Bob King

Jupiter Whacked Again? Japanese Astronomers Record Possible Impact

A group of Japanese astronomers just discovered a potential new impact at the planet Jupiter.

Theia's hit-and-run collision, in color

Solar System

Two Impacts, Not Just One, May Have Formed The Moon

The Moon may have formed in a one-two punch, new simulations suggest.

Comets

How Bright Will Comet Leonard Get?

We examine circumstances and expectations for the current apparition of Comet Leonard, which may become the year's brightest comet.

New Horizons

Astronomy in Space with David Dickinson

New Horizons Discovers Kuiper Belt "Twins"

New Horizons has spotted two asteroid pairs in the outer solar system. Their existence sheds light on how planets formed.

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