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Starlink constellation around Earth

Spacecraft and Space Missions

Starlink and the Astronomers: An Update

As Starlink satellites continue to enter low-Earth orbit — there are 360 of them now — SpaceX is working to mitigate the serious problems they pose for astronomy.

Cosmology

A Mysterious X-ray Signal Has Gone Missing

The absence of a mysterious X-ray signal — which could have provided evidence of dark matter — is causing as much controversy as its detection did.

The Milky Way's warp

Milky Way

The Milky Way’s Warped Tutu Twirls Every 600 Million Years

Astronomers have known for decades that our galaxy is warped. Now, they can follow the warp’s rotation as it travels around the galactic center.

Two neutron stars prior to merger

Stellar Science

Gravitational Waves Put Ruler to Neutron Stars

Scientists have combined observations of gravitational waves from a neutron star collision with nuclear theory to shed light on the size and nature of neutron stars.

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.

People, Places, and 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.

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.

Zoomed-in Image of the Sun from the Inouye Telescope

Professional Telescopes

First Light from the World's Largest Solar Telescope

The Daniel K. Inouye Solar Telescope has taken its first image of the Sun, a detailed view of our star's boiling gases that far surpasses what was possible before. Science operations are set to begin later this year.

Starlink launch

Spacecraft and Space Missions

SpaceX Launches Fourth Starlink Batch; Concerns Remain

Concerns about the night sky remain as the fourth batch of Starlink satellites — and the second one to be launched within the span of a month — takes flight.

Superluminous supernova SN 2006gy

Stellar Science

Superluminous Supernova, Explained?

Some brilliant explosions at least 10 times more powerful than regular supernovae might come from a white dwarf merging with a massive companion star. But not everyone agrees on that explanation.

Thuban in TESS image

Celestial News & Events

See Ancient “North Stars" Eclipse Each Other

The ancient pole star known as Thuban turns out to be an eclipsing binary. If you're up for a challenge, you can see the eclipses for yourself.

Host Galaxy of a Radio Flash

Stellar Science

New Mysterious Radio Flash Pinned Down; Hundreds More Being Discovered

Recent observations have pinpointed the location of a fifth fast radio burst, shedding light on the environs that create these powerful sources.

Star with two suns

Exoplanets

NASA's TESS Introduces Us to Our Planetary Neighbors

NASA's TESS mission announces the results from its first year of exoplanet-hunting in the southern sky, introducing us to some of our planetary neighbors.

Neutron Star Pair Collides (art)

Stellar Science

Gravitational Waves from Second Neutron-star Collision Observed

Scientists with the Laser Interferometer Gravitational-wave Observatory (LIGO) and Virgo collaborations have announced the detection of a second pair of neutron stars that went bump in the night.

shadow image of M87

2014 mu 69

Top 10 Astronomy News Stories of 2019

Our pick for the biggest astronomy news story of the year is the first-ever image of a black hole “shadow.” What's yours?

Hydrogen halo around young galaxy

Galaxies

How Young Galaxies Grow

A pair of recent studies sheds light on some of the universe’s earliest galaxies and how they grow.

Comet Borisov at perihelion

Solar System

Hubble Images Comet Borisov at Perihelion

The Hubble Space Telescope imaged the interstellar comet 2I/Borisov when it came closest to the Sun before heading back out of the solar system.

New cyclone joins Jupiter's south pole

Solar System

New Cyclone Joins Jupiter’s South Pole Club

Stunning new images from NASA’s Juno mission reveal that a new cyclone has budged its way into the grouping at Jupiter’s south pole.

Tiger Stripes on Enceladus

Solar System

How Saturn's Moon Got Its Stripes

Astronomers have struggled to understand the origin of the parallel fractures on Saturn’s icy moon Enceladus, known as “tiger stripes,” from which water-ice spews into space. Now, a single explanation ties all the pieces together.

Starlinks cross DECam image

Astronomy and Society

The Starlink Situation

Shots of the Starlink satellite train crossing the heavens are dramatic — even shocking — but they’re also a bit misleading. The real problems that Starlink and other megaconstellation satellites pose are more insidious.

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