When galaxies align. NASA

How we proved Einstein right on galactic scales – and what it means for dark energy and dark matter

How we proved Einstein right on galactic scales – and what it means for dark energy and dark matter When galaxies align. NASA Thomas Collett,…

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Artist conception of a tidal disruption event (TDE) that happens when a star passes fatally close to a supermassive black hole. Sophia Dagnello, NRAO/AUI/NSF., Author provided

Astronomers watch as black hole drags an exploding star to its death

Astronomers watch as black hole drags an exploding star to its death Artist conception of a tidal disruption event (TDE) that happens when a star…

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About a century ago, we didn’t even know that galaxies existed. Mai Lam/The Conversation NY-BD-CC, CC BY-SA

Curious Kids: will the universe expand forever, or contract in a big crunch?

Curious Kids: will the universe expand forever, or contract in a big crunch? About a century ago, we didn’t even know that galaxies existed. Mai…

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Artist impression of very young galaxy in the early universe. Credit: NRAO/AUI/NSF; S. Dagnello

ALMA Finds Most-Distant Oxygen in the Universe

ALMA Finds Most-Distant Oxygen in the Universe Galaxy 13.28 billion light-years away shows surprising signs of chemical maturity Not long after the Big Bang, the…

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The dark band is the Dark Doodad Nebula, a place where new stars and planets can form. Flickr/cafuego, CC BY-SA

A giant ‘singing’ cloud in space will help us to understand how star systems form

A giant ‘singing’ cloud in space will help us to understand how star systems form The dark band is the Dark Doodad Nebula, a place…

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X-ray “heartbeats” of two different black holes that ingest gas from their companion stars. GRS 1915 has nearly five times the mass of IGR J17091, which at three solar masses may be the smallest black hole known. Credits: NASA's Goddard Space Flight Center

NASA’s Rossi X-ray Timing Explorer Leaves Scientific ‘Treasure Trove’

NASA’s Rossi X-ray Timing Explorer Leaves Scientific ‘Treasure Trove’ NASA’s decommissioned Rossi X-ray Timing Explorer (RXTE) satellite re-entered Earth’s atmosphere on April 30. Orbiting for…

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Top-down artist depiction of a tiny black hole and a pileup of gas and matter swirling toward the center. NASA

Rossi X-ray Timing Explorer ends mission after ‘listening’ to the universe

Rossi X-ray Timing Explorer ends mission after ‘listening’ to the universe Top-down artist depiction of a tiny black hole and a pileup of gas and…

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New heavy nuclei are constantly generated in stars and other astronomical bodies. Erin O’Donnell, CC BY-ND

Elements from the stars: The unexpected discovery that upended astrophysics 66 years ago

Elements from the stars: The unexpected discovery that upended astrophysics 66 years ago New heavy nuclei are constantly generated in stars and other astronomical bodies.…

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What goes in doesn’t go out? NASA Goddard, CC BY

Black holes aren’t totally black, and other insights from Stephen Hawking’s groundbreaking work

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Stephen Hawking. Lwp Kommunikáció/Flickr, CC BY-SA

Hawking had pinned his hopes on ‘M-theory’ to fully explain the universe – here’s what it is

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Illustration of the Parker Solar Probe spacecraft approaching the Sun. Credits: Johns Hopkins University Applied Physics Laboratory

Public Invited to Come Aboard NASA’s First Mission to Touch the Sun

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