2481–2500 of 6,731 results
Magellanic Clouds

Milky Way

Supergiant Star Caught Fleeing In Another Galaxy

The discovery of a runaway star in the Small Magellanic Cloud suggests that runaway stars are a common phenomenon in the universe.

Stellar Science

“Fast Supernovae” Begin to Reveal Their Secrets

Astronomers have discovered 72 fast and furious explosions, possibly supernovae blasts cloaked in cocoons of ejected gas.

X-ray binaries around galactic center (art)

Black Holes

Our Galaxy's Center Might Hold Thousands of Black Holes

A new study has uncovered a dozen stellar-mass black holes within 3 light-years of the supermassive black hole at our galaxy’s core — and these might be just the tip of the iceberg.

Radar Tiangong

Space Missions

Tiangong 1's Remote Reentry

China's first space station reentered Earth's atmosphere over the South Pacific after almost seven years in space.

Full Easter Moon

People, Places, and Events

Global Astronomy Month Celebrates the Moon

Astronomers Without Borders celebrates the night sky in its annual Global Astronomy Month — a month-long collection of online events and in-person gatherings. This year's theme: the Moon.

Moon + Venus on April 17-18

Celestial News & Events

Tour April's Sky: Venus Ascending

This month's astronomy podcast guides you around the nighttime sky during April, giving you easy-to-follow help for finding bright planets and key stars after the Sun goes down.

galaxy without dark matter

Galaxies

A Galaxy Without (Much) Dark Matter

Astronomers have found a peculiar object: a fluffy galaxy that has little to no dark matter.

James Webb Space Telescope

Professional Telescopes

James Webb Telescope Delayed Until 2020

NASA officials announced Wednesday that the James Webb Space Telescope launch would be delayed until approximately May 2020. But before the mission can launch, its managers may have to face Congress.

Oumuamua painting by Hartmann

Solar System

Is ‘Oumuamua an Interstellar Pancake?

A new analysis of more than 800 telescopic observations suggests that our first known interstellar visitor could have the shape of a cigar or a fat disk.

Night Sky Sights

Meet Sirius, the Brightest Star

Meet the stars near Earth, starting with the brightest: Sirius, the "Dog Star."

TRAPPIST-1 system

Astronomy & Observing News

60-Second Astro News: Water-rich planets, New Planetary Timeline & Fast Stellar Death

Trappist-1's water-rich planets, a new measure of the solar system's planet-forming history, and an explanation for luminous, short-lived exploding stars.

Neutron star with red giant companion

Stellar Science

Astronomers Witness X-ray Burst from Newborn Neutron Star

Astronomers have discovered a newborn neutron star in a rare pairing with an old red giant companion.

Time's almost up

Celestial News & Events

Last Chance to See Doomed Chinese Space Station

China's premier space station, Tiangong 1, has a one-way ticket into the Earth's atmosphere later this month. See it before it's no more.

ALMA's view inside Orion Nebula

Stellar Science

Look Inside the Orion Nebula

New ALMA observations reveal a fiber-like structures within a longer, well-studied filament. These fibers contain the seeds of future stars.

Black Holes

Physicist Proposes Alternative to Black Holes

A physicist has incorporated a quantum mechanical idea with general relativity to arrive at a new alternative to black hole singularities.

24-hour clock with telescopes

Astronomy and Society

Daylight-Saving Time? Bah, Humbug!

Still controversial, the annual switch to daylight saving time is annoying to backyard astronomers — and probably doesn't save any energy after all.

Yerkes Observatory

People, Places, and Events

The Not-Quite Closing of Yerkes Observatory

The University of Chicago is ending its support for Yerkes Observatory, a historic, castle-like building built to house a gigantic telescope, on October 1st. Its future remains unclear.

Relic galaxy NGC 1277

Astronomy & Observing News

60-Second Astro News: A Relic Galaxy, Changing Ceres & The Aurora Named "Steve"

Hubble reveals a relic galaxy, Dawn sees the surface of asteroid Ceres changing, and scientists probe an auroral phenomenon named "Steve."

People, Places, and Events

Stephen Hawking, 1942–2018

Stephen Hawking, renowned physicist, famed science communicator, and all-around inspiration, has passed away at the age of 76.

Solar System

Hubble: Weather Watcher of the Outer Solar System

Hubble's powerful eye scouts the outer planets once an Earth year, shedding light on planetary weather, like Jupiter's Great Red Spot and Neptune's Great Dark Spot.