Rafi Letzter

Nothing like this has ever been done before.

There's a dwarf planet in our solar system, far beyond the orbit of Pluto, that swings so far away from the sun that from its perspective Earth and Saturn look like neighbors.

It's a busy February for Mars, with three probes from three separate space agencies arriving at the red planet over the course of just nine days. Here's why.

The mystery at the heart of an unexplained, bright point of gamma-ray light in the sky has been solved: a violent, whirling redback.

In 2018, one of the brightest X-ray lights in the sky went dark, and scientists still aren't sure why.

Sea levels will probably rise faster than the most mainstream climate models predict, according to a new study.

SpaceX tested one of its giant, silver "Starship" prototypes Tuesday (Feb. 2). And for the second time in two months, it exploded on landing.

It's now possible to send uncrackable quantum messages through thin air, and the people who figured out how to do it are getting ready to send the messages into space.

Ever ridden a teacup ride at a state fair? If so, you might have a small taste of life in a whirling, twirling sextuply-eclipsing sextuple star system.

All that sanitizer people have been using since the start of the COVID-19 epidemic has led to more than just dry hands and eye-watering smells: It's nearly blinding some children.

SpaceX plans to test-fire its enormous Starship prototype's engines in Boca Chica, Texas at some point today (Jan. 20).

A stolen copy of a da Vinci painting has turned up in an Italian apartment, even though no one knew it was missing. The museum where it was kept had been shuttered due to COVID-19.

Data from the now-destroyed Arecibo radio telescope has revealed a bizarre new type of hybrid venomous-spider star.

NASA is going to light up the most powerful rocket it's ever built Saturday (Jan. 16), though it won't go anywhere.

A rapidly twirling, ultramagnetic 500-year-old infant has been spotted zipping at never-before-seen speeds through the Milky Way. It belongs to a super-rare flavor of super-rare star.

NASA plans to ignite an absolutely mammoth rocket on Jan. 17, the largest it's built since the Apollo program

Harvard astrophysicist Avi Loeb has reignited a debate about whether alien life can explain an object that visited the solar system in 2017 in a scathing new book.

Similar to the bonds found in water, but way more powerful, this new bond could offer deep insight into the true workings of chemical reactions.

A new study shows that due to pollution already released, Earth will eventually blow past Paris goals. But that doesn't mean all is lost.

Medical discoveries dominated the news in 2020, but even under pandemic conditions, astronomers discovered amazing things in space in 2020.

This year saw a possible first detection of solar axions, and the possible death of the sterile neutrino.

There's a giant asteroid somewhere out there in the solar system, and it hurled a big rock at Earth that left behind meteorites unlike any scientists had ever seen.

A telescope close-up reveals the strange beauty of the Great Conjunction.

Did the biblical "Star of Bethlehem" come back in 2020? It wouldn't be crazy to think so. But it's not the only possibility.

Astronomers hunting for radio signals from alien civilizations have reportedly detected an "intriguing signal" from the direction of Proxima Centauri, the nearest star system to the sun.