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An accounting of all the water that should have been and gone on Mars’s surface has come up with a discrepancy that shows just how little we understand the Red Planet’s hydrological history

Earth Observatory

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Earth Observatory

1. Science
2. Earth Observatory
3. Seeing Blue During…

• Earth
• Earth Observatory
• Image of the Day
• EO Explorer
• Topics
• More Content
• About

In his blockbuster 1982 novel "Space", the writer James A. Michener wove a gripping tale of astronauts trapped on the Moon during a major solar storm. Warnings from Earth didn't come soon enough to save them from death by radiation sickness. To avoid such a tragedy happening with the Artemis crews (as with the Apollo crews of the past), NASA and the National Oceanic and Atmospheric Administration (NOAA) will monitor the Sun. If it acts up, the teams will be able to send warnings and instructions to the Artemis crews to pro tect them.

Finding life beyond our solar system goes beyond measuring an exoplanet’s size, as rocky, Earth-sized worlds might not have the conditions for life as we know it. While exoplanets can be directly imaged by blocking their star’s glare, these images are fuzzy and lack resolution to provide enough details about the habitability. Therefore, astronomers are limited to studying an exoplanet’s atmosphere, and this has proven to be quite beneficial in teaching scientists about an exoplanet’s formation and evolution, and whether it contains the necessary ingredients for life as we know it.

NASA is targeting April 1 to launch a crew of four astronauts on a journey around the moon that will set the tone for the agency’s lunar exploration ambitions

What's happening at the end of that street?

This familiar phenomenon has puzzled researchers for centuries, but experiments are finally making sense of its unruly behaviors

'Wake up and ask yourself, 'Is what I'm doing helping us get back to the moon?' … If it's not, stop doing it.'

It was the 114th Falcon 9 mission of 2025 already.

"This shows how effective the approach of 'Discover with Subaru Telescope, explore with James Webb' can be."

The new finding may solve an "astrophysics mystery that has stood for nearly half a century."

"Sometimes it's the extreme objects that help us understand what's happening in the average ones."

These celestial wonders can tell us a lot about the state of the atmosphere at home on Earth as well as on other planets.

Phases of ice that exist naturally only on frozen moons could be detected using infrared spectroscopy, according to new laboratory experiments.

The beams hint at the true scale of the massive star that spawned them.

"Capturing another satellite like this in an Earth-observation image is extremely rare."

Though NGC 7456 looks like a modest spiral galaxy, new Hubble and XMM-Newton observations reveal a bustling system with star-forming regions and an active core.

"The idea was for our payload to get us just up to the potential biosignature designation and have the rest of the story told by instruments here on Earth."

Liftoff is scheduled for 11:54 a.m. ET today (Sept. 11).