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Solar System

New Horizons Reveals Full Picture of Arrokoth...and How Planets Form

New Horizon’s flyby of Arrokoth, a planetesimal in the Kuiper Belt, reveals a pristine object untouched since the solar system’s origin. Its shape and geology show that planetesimals form more gently than previously thought.

Parker Solar Probe

Solar System

Parker Solar Probe Releases New Details on Solar Wind

Scientists release a bevy of results from the Parker Solar Probe's first two passes near the Sun, including new details on so-called "rogue waves" in the solar wind.

Comet Borisov

Solar System

A Detailed View of Our Second Interstellar Visitor

What do we know about the second object to visit us from another stellar system? Detailed Hubble images have given us plenty to consider!

Solar Orbiter

Solar System

New Solar Orbiter Mission Launches Successfully

The Solar Orbiter mission took to the skies Sunday evening and will join ongoing efforts to understand our host star.

Beating heart on Pluto

Solar System

Pluto's Icy Heart "Beats," Driving Planet-Scale Winds

New computer simulations suggest that the "beating" of Pluto's frozen heart drives weak winds on this remote world in the outer solar system.

Globular cluster NGC 4147

Solar System

60-Second Astro News: Planets in Tight Quarters & Kuiper Belt Forays

Astronomers have calculated the loss of planets around stars in globular clusters, and New Horizons returns observations of worlds in the outer solar system.

Comet Borisov at perihelion

Solar System

Hubble Images Comet Borisov at Perihelion

The Hubble Space Telescope imaged the interstellar comet 2I/Borisov when it came closest to the Sun before heading back out of the solar system.

New cyclone joins Jupiter's south pole

Solar System

New Cyclone Joins Jupiter’s South Pole Club

Stunning new images from NASA’s Juno mission reveal that a new cyclone has budged its way into the grouping at Jupiter’s south pole.

Osiris-rex

Astronomy in Space with David Dickinson

NASA Announces Site of Sample Selection for Osiris-REX

NASA has picked the "Nightingale" site, located within a small crater on the asteroid Bennu, for its Osiris-REX mission to sample next year.

Tiger Stripes on Enceladus

Solar System

How Saturn's Moon Got Its Stripes

Astronomers have struggled to understand the origin of the parallel fractures on Saturn’s icy moon Enceladus, known as “tiger stripes,” from which water-ice spews into space. Now, a single explanation ties all the pieces together.

bennu activity

Solar System

Asteroid Bennu’s Activity Still a Mystery

The near-Earth asteroid constantly shoots out rocks, leaving planetary scientists perplexed.

Parker Solar Probe

Spacecraft and Space Missions

First Science Returns from NASA's Parker Solar Probe

In the first public release of data from NASA’s flagship heliophysics mission, scientists on the Parker Solar Probe team reveal surprises and mysteries from our host star.

Global map of Titan's geological features

Solar System

First Global Geological Map of Saturn’s Moon Titan Released

Working with data from NASA’s Cassini mission, scientists have produced the first global map of Titan’s geological features.

Hayabusa 2

Spacecraft and Space Missions

Hayabusa 2 Leaves Asteroid Ryugu and Heads Home

The Hayabusa 2 spacecraft has completed its mission at asteroid Ryugu — including collecting samples — and is now journeying back to Earth.

Illustration showing position of Voyager 1 and Voyager 2

Solar System

Interstellar Space: The View from Voyager 2

Voyager 2 crossed into interstellar space a year ago. Now, five teams of astronomers have analyzed the data it returned to paint a picture of the outer boundary of the solar system.

Incoming point

Explore the Night with Bob King

"Potentially Hazardous" Asteroid Is Headed For Your Telescope

A potentially hazardous asteroid makes a flyby of Earth this Friday, offering amateurs with modest telescopes a chance to ride along.

Comet 2I/Borisov

Solar System

Interstellar Comet Borisov "Indistinguishable" from Solar System Comets

The solar system's newest interstellar visitor, Comet 2I/Borisov, bears a striking resemblance to the icy population of the outer solar system.

Saturn's new moons

Solar System

Help Name Saturn’s 20 Newfound Moons

Astronomers have found 20 new moons circling Saturn — now you can help name them!

Mars Mole

Spacecraft and Space Missions

Work to Save NASA's "Mole" on Mars Continues

NASA engineers hope to use the scoop at the end of the lander's robotic arm to get the Insight lander's heat probe burrowing once again.

Venus in false-color

Solar System

The Clouds of Venus Puzzle Scientists

Japan’s Akatsuki spacecraft has revealed some previously unknown dynamics in the Venusian atmosphere, but their origin is far from clear.

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