Out There: An Interstellar Visitor Both Familiar and Alien

Astronomers offer new details about Oumuamua, a probable asteroid arriving from beyond the solar system and…

LIGO Detects Fierce Collision of Neutron Stars for the First Time

Seen and heard, the fireball is a stunning breakthrough into kilonovas, bursts of energy believed to…

2017 Nobel Prize in Physics Awarded to LIGO Black Hole Researchers

Rainer Weiss of M.I.T. and his Caltech collaborators Kip Thorne and Barry Barish discovered ripples in…

New Gravitational Wave Detection From Colliding Black Holes

Virgo, a new detector for gravitational waves, joined the L-shaped antennas seeking space-time reverberations from colliding…

Trilobites: Sputnik for Sale, if You’ll Settle for a Beeping Replica

Just ahead of the 60th anniversary of the first Earth launch of a satellite, an auction…

Out There: Cassini Flies Toward a Fiery Death on Saturn

Launched in 1997, the Cassini-Huygens mission has reshaped scientific understanding of the solar system’s most exotic…

Out There: A Reverie for the Voyager Probes, Humanity’s Calling Cards

Launched 40 years ago, the spacecraft have sailed beyond the solar system, artifacts of a civilization…

Out There: During an Eclipse, Darkness Falls and Wonder Rises

A total solar eclipse brings tears, screams, even reverence to those in its path.

Out There: The Eclipse That Revealed the Universe

In 1919, British astronomers photographed a solar eclipse and proved that light bends around our sun…

Giant Telescope Atop Hawaii’s Mauna Kea Should Be Approved, Judge Says

The Thirty Meter Telescope, which would be the largest in the Northern Hemisphere, could survey black…