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Then and now

Celestial News & Events

The Fall and Rise of Betelgeuse

With its recent uptick in brightness, Betelgeuse appears to be slowly returning to normal. But will it? Astronomers urge us to keep watch.

Insight lander on Mars

Spacecraft and Space Missions

NASA’s Insight Detects Many Marsquakes on the Red Planet

Persistent tremors on Mars suggest the planet’s interior is cooling and hint that there might be a pocket of magma beneath the surface.

Massive, dusty, star-forming galaxy

Galaxies

What Snuffed Out Star Formation in This “Monster” Galaxy?

Astronomers have discovered a galaxy that formed five times as many stars as the Milky Way within 2 billion years after the Big Bang — but then quickly quelled any further starbirth.

M35 in Gemini

Types of Objects to Observe

Explore the Winter Hexagon Tonight

This expansive region is home to plenty of bright stars and deep-sky wonders.

SLS rocket

Science and Space Policy

What's in the New Proposed NASA Budget

The President's 2021 budget request for NASA would push hard for human lunar exploration at the expense of several key programs.

Solar System

New Horizons Reveals Full Picture of Arrokoth...and How Planets Form

New Horizon’s flyby of Arrokoth, a planetesimal in the Kuiper Belt, reveals a pristine object untouched since the solar system’s origin. Its shape and geology show that planetesimals form more gently than previously thought.

Betelgeuse telescopic view

Stellar Science

Is Betelgeuse Approaching a Crossroads?

Astronomers all over are waiting with bated breath to see what Betelgeuse will do next. Is it going to start brightening again on February 21st? Or will it continue to surprise?

Celestial News & Events

Do You Love the Stars? Do Some Astronomy This Valentine's Day

Whether you're celebrating Valentine's Day or boycotting it, anyone visiting this site loves the stars. Here's a chance to participate in an effort to make sure future generations love them too.

Mars at the moon's edge

Occultations

Watch the Moon Occult Mars Before Sunrise on February 18th

Occultations of stars by the Moon occur routinely, but planetary lunar occultations are much rarer birds. That's why I hope you'll make the effort Tuesday morning February 18th to watch the waning crescent Moon occult the planet Mars.

Parker Solar Probe

Solar System

Parker Solar Probe Releases New Details on Solar Wind

Scientists release a bevy of results from the Parker Solar Probe's first two passes near the Sun, including new details on so-called "rogue waves" in the solar wind.

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