NASA systems engineering team details Habitable Worlds Observatory mission architecture

Finding an Earth-like world beyond the solar system is the holy grail of exoplanet research, and the field has seen remarkable technological advances in detecting and studying exoplanets since the first confirmed exoplanet around a sun-like star was discovered in 1995. These advances include ground- and space-based telescopes, notably the James Webb Space Telescope. Although […]

Comets probably didn’t seed life on Earth after all, new study suggests

The theory that comets delivered the molecular building blocks for life on Earth is a long-standing one, since comets are known to carry many of these molecules. However, a new study challenges this idea.

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Rubin Observatory reveals its first dwarf planet candidate in our solar system

Scientists may add a new dwarf planet to the official roster of our solar system. The distant, icy body, provisionally dubbed 2026 ED138, orbits our system beyond Pluto. It was spotted earlier this month by a scientist combing through data from the Simonyi Survey Telescope at the NSF-DOE Vera C. Rubin Observatory.

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A brief-ish history of METI. Part I: Early ideas and experiments

Long before modern astronomy, humans looked to the stars and were astounded by what they saw. Even by the most ancient reckoning, the night sky offered enough to inspire awe and wonder, make us feel insignificant, fire our imaginations and foster hope and a sense of connection. Yet, for as long as humans have surveyed […]

Double debris disk orbiting a dead star hints at our solar system’s future

Astronomers using the European Southern Observatory’s Very Large Telescope (ESO’s VLT) have found a rare disk of debris around a dead star that provides a glimpse of what may happen to our solar system. Unlike in similar systems previously found, the debris—the leftovers of planets that once orbited the star—is organized in a double disk, […]

Autonomous rendezvous system overcomes simulated spacecraft failures in lab tests

There is a problem in low Earth orbit, and it’s growing. According to the European Space Agency, there are about 19,440 satellites on orbit, 3,540 of which are nonfunctioning and/or not emitting a signal to warn other spacecraft of their location. The need to service these sleepwalking satellites in space will only increase as more […]

First light: Hera resolves two asteroids instead of one

The European Space Agency’s Hera spacecraft for planetary defense has resolved its two target asteroids separately for the first time, revealing the binary nature of the Didymos system, currently some 197 million km (122 million miles) away from Earth.

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Earth may have formed much of its water as the planet grew

Earth may have produced much of its water during the planet’s formation, as rocky pebbles reacted with the hydrogen-rich atmosphere surrounding the young planet, according to new research published in Nature Geoscience. The findings offer a potential explanation for how Earth acquired one of the essential ingredients for life and suggest that similar water-producing processes […]

Perseverance offers clues to protect crews from ultrafine Mars dust

Over 1,645 Martian days, NASA’s Perseverance Mars rover measured the fine and ultrafine Martian dust particles found clinging to samples of spacesuit materials that are carried aboard the rover, including particles small enough to penetrate the lungs and enter the bloodstream. The findings are published in the Proceedings of the National Academy of Sciences and […]

Radio images reveal disturbances from Betelgeuse’s mysterious companion that lurks within its shadows

The well-known star Betelgeuse has a mysterious houseguest—and it’s shaking the rafters, rattling the pipes and slamming the cupboards (metaphorically speaking). It’s causing enough subtle atmospheric disturbance that it might as well be making ghost noises. Who’s to blame? New data suggest that its recently discovered companion star, Siwarha, is the one doing the haunting. […]

Webb links interstellar comet 3I/ATLAS to worlds beyond Neptune through similar ice signatures

A Southwest Research Institute–led study used NASA’s James Webb Space Telescope to examine ice grains streaming from interstellar comet 3I/ATLAS, just the third object from beyond our solar system ever identified. The observations point to tiny aggregates of water ice and dust, about a micron or smaller.

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27 exoplanet targets for the world’s first private space telescope

The Lazuli Space Telescope will be the first private space telescope. It’s the brainchild of Eric Schmidt, Google’s former CEO. It will have a 3-meter mirror (9.8 feet), larger than Hubble’s 2.4-meter mirror (7.9 feet), and will be launched by 2029.

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Clouds on a lava planet challenge what astronomers expected

A rocky lava planet once thought to be too extreme to have an atmosphere appears to be wrapped in one with a reflective layer of vaporized silicate mineral clouds, the same family of compounds that make up quartz and sand.

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Laser-blasted plasma shows how instabilities could heat the sun’s corona

From its visible surface, the sun radiates heat at a relatively cool temperature of 5,800 Kelvin. Yet within the thin outer layer of the sun’s atmosphere known as the corona, electrons can reach temperatures of millions of degrees, for reasons astronomers have yet to fully explain.

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Stellar collisions may have been common when the universe was young

In our solar system’s corner of the galaxy, stars rarely collide. It makes sense: Space is vast, and stars have room to roam. Even in most of the present-day universe, stellar collisions are rare. The James Webb Space Telescope, however, peers deep enough into space to see the universe as it was not too long […]