Robert Lea

The mystery of what dwells within dead stars could be solved at last, thanks to supercomputer simulations that show neutron stars are comprised of "cold quark matter."

If the James Webb Space Telescope detects depleted carbon dioxide in a planet's atmosphere, that could indicate water.

On Dec. 30, 2023, NASA's Juno spacecraft came closer to the volcanic moon Io than any other mission has in 20 years. In the process, Juno was able to grab some incredible images.

A coronal mass ejection from an X-5 class flare that erupted on New Year's Eve, the strongest flare of solar cycle 25, will likely trigger geomagnetic storms when it hits Earth today (Jan. 2).

Astronomers have discovered a new gas cloud created by winds blown from a rapidly spinning neutron star, naming it "Potoroo" after a small Australian marsupial.

NASA 'sCuriosity Rover filmed footage from dawn to dusk, capturing half a day on Mars as it sat waiting for contact with ground control Nov. 8.

'God of Chaos' asteroid Apophis will make a flyby like no other in recorded history in 2029 as it becomes visible with the naked eye, and NASA's OSIRIS-APEX spacecraft will be on hand to supervise.

NASA's Juno spacecraft will come closer to Jupiter's moon Io on Dec. 30 than any spacecraft has in 20 years, getting a good look at the solar system's most volcanic body.

SpaceX ended 2023 with not 1 but 2 rocket launches. Within hours on Dec. 28, it sent a Falcon Heavy rocket loaded with the X-37B space plane, and a Falcon 9 carrying Starlink satellites.

SpaceX launched 23 new Starlink satellites from Cape Canaveral Space Force Station in Florida on Thursday (Dec. 28).

Japan's space agency says its H3 rocket will attempt to fly again as soon as Feb. 14, 2024. That's nearly a year after the rocket's explosive failure, shortly after its 1st liftoff.

Arriving in orbit on Christmas Day, Japan's lunar lander SLIM has beamed images of the lunar surface home ahead of its planned touchdown on the moon on Jan. 19.

Astrobotic's Peregrine lunar lander was stacked on the rocket that will launch it to space, with final checks and fueling now completed.

The final full moon of 2023, the Cold Moon, rose on Dec. 26. Skywatchers around the globe were primed and ready to capture some fantastic images of the fully illuminated lunar face.

NASA has laid out a roadmap for major aspects that need to be addressed while developing a robotic system that can explore icy moons with water oceans.

The gold that forms the ring on your finger was formed in the collision between two neutron stars. Now, scientists have mapped the kilonova blasts powered by these collisions in detail.

Astronauts aboard the International Space Station celebrated Christmas and Hannukah this festive season with the hanging of stockings and "lighting" a felt menorah.

The Hubble Space Telescope spotted a gathering of spiral galaxies for a stunning image released Monday (Dec. 25). But this apparent togetherness may be an illusion.

The last full moon of 2023, December's Cold Full Moon, will miss Christmas by just a day this year, illuminating the sky over Earth on Tuesday (Dec. 26).

The space telescope imaged a globular cluster located in the Milky Way satellite galaxy named the Large Magellanic Cloud, ensuring a starry white Christmas for space fans.

2023 has been a bumper year for black holes, especially those of the supermassive variety. Here is Space.com's picks for the most exciting black hole stories of the year.

Launching in Jan. 2024, the Einstein Probe will use a "lobster eye" to search the universe for blasts of X-rays and help scientists investigate powerful cosmic events like supernova explosions.

The moon and Jupiter will meet-up with Jupiter for one last time in 2023 on Friday (Dec. 22), with the two bodies making a close approach to each other in the sky as they reach conjunction.

The annual December meteor shower, the Ursids, peaks overnight on Dec. 22, allowing skywatchers willing to brave the cold the chance to spot meteors streaking through the sky ahead of Santa Claus.

A festive image from the Very Large Telescope shows the clouds of the 'Running Chicken Nebula' looking like a turkey fleeing a cosmic Christmas dinner.