Oldest Material on Earth Discovered
Scientists analyzing a meteorite have discovered the oldest material known to exist on Earth. They found dust grains within the space rock — which fell to Earth in the 1960s — that are as much as 7.5 billion years old.
BBC News
Topics: Stars
LIGO and Virgo Probably Spotted the First Black Hole Swallowing Up a Neutron Star
Astronomers may have detected gravitational waves from a new type of event.
Science News
Topics: Black Holes Gravitational Waves Stars
A Star Orbiting in the Extreme Gravity of a Black Hole Validates General Relativity
The star S0-2 gets so close to the supermassive black hole at the center of the galaxy that it can be used to test our fundamental understanding of gravity.
Smithsonian
Topics: Black Holes Gravity Relativity Stars
Mystery Of Universe’s Expansion Deepens With New Cosmic Calculation
The question of how fast the universe is expanding just keeps getting more confusing.
New Scientist
Topics: Stars Universe
Alternative Theory of Gravity Makes a Nearly Testable Prediction
A massive simulation done with a “chameleon” theory of gravity.
Ars Technica
Topics: Dark Energy Dark Matter Galaxies Gravity Relativity Stars Universe
Gravitational Waves, Nuclear Fire, Rocks and Love
A 5-billion-year-old detective story reveals two new players in our origins.
Scientific American
Topics: Caleb Scharf Stars
Gravitational Waves Hint at Detection of Black Hole Eating Star
LIGO and Virgo observatories have spotted ripples from what could be the first-ever detection of this long-sought event.
Nature
The Universe Seems to Be Expanding Faster Than All Expectations
New evidence deepens a mystery around the Hubble constant, one of the most important numbers in cosmology.
National Geographic
The M87 Black Hole Image Showed the Best Way to Measure Black Hole Masses
Its diameter suggests the black hole is 6.5 billion times the mass of the sun.
Topics: Black Holes Stars
Black Holes and Neutron Stars: A Merger in Space
With Duncan Brown, Vicky Kalogera, Frans Pretorius, Jocelyn Read, and moderator Mario Livio.
World Science Festival
When Black Holes Burp, Stars Sense It
As a grad student, Priya Natarajan theorized that winds emanate from black holes, affecting nearby stars. Now, new evidence hints that she was right.
Science Friday
Topics: Black Holes Galaxies Stars
Where Are All the Aliens? Struggling and Hustling, Just Like Us
Conventional wisdom has it that aliens should be either everywhere, or nowhere. A new model suggests they can be both.
Popular Science
Topics: Extraterrestrial Life Galaxies Stars
Gravitational Waves Could Solve a Cosmological Crisis Within Five Years — or Shake Physics to Its Core
We’re closing in on one of the most important numbers in the universe.
Topics: Black Holes Gravitational Waves Stars Universe
The Disks of Gas and Dust That Supposedly Form Planets Don’t Seem to Have the Goods
A new study finds that protoplanetary disks — the envelopes of dust and gas around young stars that give rise to planets — seem to contain orders of magnitude too little material to produce the planets.
Science
Topics: Exoplanets Stars
Long Evolution of the Universe
A new interview series.
Closer To Truth
Topics: Avi Loeb Cosmic Origins Galaxies Stars Universe
Harvard, MIT Scientists Propose New Method to Measure Universe’s Expansion
Scientists from Harvard and MIT could have the key to discovering how the universe began and whether it will continue expanding or eventually collapse.
The Boston Globe
Gravitational Waves Hold Key to Knowing How Fast the Universe Is Expanding
Two physicists propose using rare pairs of black holes and neutron stars to nail down a more precise Hubble constant.
Inverse
How Will Future Civilizations Survive the Accelerating Expansion of the Universe?
Without the ability to access new stars, civs would no longer be able to sustain themselves and expand. The accelerating expansion of the Universe, therefore, would eventually present an existential threat to highly technological intelligent life.
Gizmodo
Topics: Avi Loeb Dark Energy Galaxies Stars Universe
Are We Alone?
The hunt for clues in the universe to answer one of humanity’s biggest questions.
NOVA
Topics: Exoplanets Extraterrestrial Life Habitability Stars
Physicists in Earth’s Remotest Corners Race To Reproduce ‘Cosmic Dawn’ Signal
Teams rush to capture faint radiation from Universe’s first stars, while theorists seek to explain puzzling observations.
Topics: Cosmic Origins Dark Matter Stars Universe
Physicists in Earth’s Remotest Corners Race to Reproduce ‘Cosmic Dawn’ Signal
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