Physicists Detect the Most Massive Black Hole Merger Ever Observed by Studying Gravitational Waves
A short-lived ripple in space-time revealed that two black holes merged into a giant black hole with the mass of 225 suns
Rare Appearance of Two Novas at Once Illuminates the Southern Sky. Here’s How to Get a Chance to See It
The “new stars” are best seen from the Southern Hemisphere, but people have spotted them from the United States by looking near the southern horizon
Mysterious Radio Pulses Found in Antarctica Seem to Defy Physics, and Researchers Are Trying to Trace Their Origins
Strange signals detected by a NASA instrument more than a decade ago have continued to confound scientists, but a new paper rules out cosmic neutrinos as a source
See the First Breathtaking Images Captured by the Powerful New Telescope at the Rubin Observatory
Featuring never-before-seen views of galaxies and more than 2,100 newly discovered asteroids, the observations are only a taste of what to expect from the telescope’s upcoming decade-long survey
Did Water Form in the Earliest Years of the Universe?
A recent study suggests huge volumes of the molecule emerged during the cosmic dawn
See the First Visible Auroras Captured on Mars, Glowing a Hazy Green Above the Planet
Scientists directed NASA’s Perseverance rover to take an image of the Martian sky after a solar storm in hopes that an aurora would show up
Astrophysicists Track Down the Mysterious Cosmic Origins of Gold and Other Heavy Metals in Our Galaxy
Researchers suggest powerful bursts from magnetars—collapsed stars with strong magnetic fields—may have contributed up to 10 percent of all elements heavier than iron in the Milky Way
A New Analysis Raises Doubts About Potential Hints of Life Recently Detected on a Distant Exoplanet
Astronomers published evidence of possible biosignatures on the planet K2-18b earlier this month, but another look at the data suggests the finding could be statistical noise
From Worlds That Look Like Cotton Candy to Others Covered in Volcanoes, These Are the Strangest and Most Captivating Exoplanets
Scientists are using an array of instruments to detect other planets, some of which may harbor life—and others that most definitely don’t
Scientists Detect ‘Unexpected’ Oxygen in the Most Distant Galaxy Ever Found, Defying Ideas About the Early Universe
The findings suggest galaxies formed much more quickly than astronomers assumed
Mysterious Dark Energy Might Be Weakening—and That Could Upend Predictions About the End of the Universe
Astronomers thought dark energy was a constant. But now, findings from the Dark Energy Spectroscopic Instrument provide even more evidence that it may be fluctuating
The First Big Data Drop From the Euclid Space Telescope Unlocks a ‘Treasure Trove’ of Insights on the Universe’s Mysteries
The European Space Agency’s “dark universe detective” discovered millions of new galaxies and offers potential clues about dark matter
A Century Ago, Pioneering Astrophysicist Cecilia Payne-Gaposchkin Showed Us What Stars Are Made Of
The trailblazing Harvard scientist, who documented the dominance of hydrogen and helium in stars, is still inspiring researchers today
Astronomers Discover Evidence of a Stealthy Supermassive Black Hole Hiding Right ‘Under Our Noses’
The Large Magellanic Cloud is one of the most well-studied galaxies, but new findings suggest it might have been holding a giant secret
This Comprehensive Guide Will Answer the Questions You Have About Black Holes—and Spark Some New Ones
In a new book release, two scientists combine forces to explain the discoveries, developments and theories made in the realm of the densest objects in space
James Webb Telescope Reveals a Dazzling Light Show From the Milky Way’s Black Hole
Unpredictable bursts of light are pulsing from the debris surrounding Sagittarius A*, offering new insights into the mysterious behavior of the most massive object in our galaxy
A Record-Breaking ‘Ghost Particle’ From Outer Space Made a Splash of Light in the Mediterranean
The neutrino was 30 times more energetic than any other previously observed particle of its kind. Scientists still don’t know exactly where it came from
An Enormous, Branching String of Galaxy Clusters Is the Largest Known Structure in the Universe, Scientists Say
The cosmic superstructure Quipu is more than 13,000 times the length of the Milky Way, and its mass is 200 quadrillion times that of the sun, according to preliminary research
Astronomers Discover Extremely Rare Einstein Ring in Early Euclid Telescope Data, Revealing Warped Space-Time
Such examples of gravitational lensing can help astronomers learn more about the properties of dark matter
Two of the Moon’s Grand Canyons Were Formed in Just Ten Violent Minutes, New Study Suggests
Scientists say Vallis Schrödinger and Vallis Planck—dramatic trenches near the lunar south pole—were carved in a blast that unleashed 130 times the amount of energy in Earth’s global nuclear weapons inventory
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