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An artist's illustration of a dangerous asteroid headed for Earth.

'Planetary defense is knowing what's out there and what could do harm to us.' Meet the scientist who helped build NASA's asteroid response plan

By Leonard David published

A Q&A with Lindley Johnson, a pioneer in blueprinting warning and response scenarios to any potential impact of Earth by an asteroid or comet.

Asteroids
This image from ESA’s Mars Express spacecraft shows the Acheron Fossae region of Mars. This region shows many signs of past activity, from trough-like ditches and steep cliffs to smooth plains and tall domes formed by volcanism.

New photos from European Mars orbiter show dynamic, volcanic Red Planet terrain

By Julian Dossett published

The European Space Agency just released some new snapshots from its Mars Express orbiter that detail the dynamic terrain of the Red Planet's Acheron Fossae region.

Mars
graphic showing an astronaut sitting on the moon looking at a laptop with earth in the background.

Tax Day in space: How do astronauts pay taxes off Earth?

By Elizabeth Howell last updated

Reference Paying taxes in space is a necessity, no matter where you happen to be visiting. This is what U.S. astronauts and other space fliers can expect.

Reference
The full moon as seen from the International Space Station on Dec. 8, 2022. The moon is setting below Earth’s horizon as the station flew 269 miles above the southern Indian Ocean.

Easter is coming late in 2025, astronomically speaking. Here's why

By Joe Rao published

Easter falls on the Sunday that follows the first full moon occurring on or after the day of the spring equinox. So it seems like Easter should be this weekend. Here's why it isn't.

The moon
An artist's rendering of NOAA's GOES-19 satellite in orbit.

The newest GOES weather satellite in NOAA's fleet is now fully operational (video)

By Meredith Garofalo published

The powerful GOES-19 satellites, one of the most advanced ever built, has taken on a new name.

Earth
A bird flies in front of a NASA symbol on a building.

Elon Musk's DOGE team given 'alarming degree' of access to NASA systems, House Democrats say

By Monisha Ravisetti published

"None of these three individuals possess the slightest background or experience in space policy or government service."

Earth
Solar Orbiter took this image of the sun during its close approach in March 2022. At that time, the spacecraft was closer to the star than the solar system's innermost planet Mercury.

The sun just leaked a huge amount of helium-3 — the rare isotope scientists want to harvest on the moon

By Victoria Corless published

The sun was caught bursting out a huge quantity of helium-3, an isotope that's scarce in our solar system.

The Sun
a composite of two photographs of full moons, one showing a smaller micromoon and another showing a larger supermoon

Watch April's Full Pink 'micromoon' rise this weekend with a free telescope livestream

By Samantha Mathewson published

The Full Pink Moon rises Saturday (April 12), marking the farthest, smallest and faintest full moon of the year, and you can watch it live online.

The moon
a comet with a long tail streaks through a star filled sky above trees.

What to expect from the newfound Comet Swan: An observer's guide

By Joe Rao published

Here's an observers' guide to the newly discovered Comet 2025 F2 (SWAN), which is visible in northern skies right now.

Comets
A person drawing on a piece of paper in the darkness. Three other pieces of paper show the sun.

Trump administration's NOAA layoffs affected the space weather service that tracks solar storms

By Meredith Garofalo published

Experts share why Trump-mandated cuts to the NOAA's Space Weather Prediction Center share is a big deal.

Earth
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