1701–1720 of 6,731 results
illustration of X-ray binary system

Black Holes

Astronomy News: Galactic One-Two Punch, Black Hole Heartbeat Falters

In the news this week: Globular clusters have the detailed scoop on our galaxy's past, and a "heartbeat" black hole binary in the Milky Way has gone mysteriously dim.

Astronomy & Observing News

This Week in Astronomy Pictures: A Magnetic Whirlpool, Windblown Jets & More

Whether you're here for eye candy or a more cosmic perspective, these astronomy pictures released this week will do the trick.

Most distant quasar

Black Holes

What the Most Distant Quasar Tells Us About Black Hole Birth

The existence of a quasar when the universe was only 670 million years old is helping astronomers understand how black holes are born.

Moon passing Mars, Jan 20-21, 2021

Celestial News & Events

This Week's Sky at a Glance, January 15 – 23

Bright Capella high overhead, and equally bright Rigel in Orion's foot, have almost the same right ascension. This means they cross your sky’s meridian at almost exactly the same time. So whenever Capella passes the zenith, Rigel marks true south, and vice versa. That happens around 9 or 10 p.m. now.

Giant flare on a magnetar

Stellar Science

Masquerading Magnetars Make Short Brilliant Bursts

Giant flares emitted from the surface of highly magnetized neutron stars could explain some gamma-ray flashes astronomers have caught over the past few decades.

Supermassive black hole devouring a star

Black Holes

Black Hole Feasts on Star, Bite by Bite

Like a cosmic blinker, a distant supermassive black hole is flaring every 114 days. Astronomers believe the eerily regular signal betrays the piecemeal devouring of a star.

Exoplanets

Rocky Planet Found Around 10 Billion-Year-Old Star

Astronomers have found an Earth-size (but not at all Earth-like) planet around an ancient star that has a nice high view of our galaxy.

Pulsar detected by FAST

Professional Telescopes

China Opens World's Largest Radio Telescope to International Scientists

Scientists outside China will be allocated around 10% of observation time on its gigantic radio telescope following the collapse of Arecibo.

Timing an array of pulsars

Black Holes

Pulsars Show Hint of Gravitational-wave Background

Duos of supermassive black holes tangoing throughout the universe make their own music, and astronomers may have picked up a hint of the tune.

Lost Jovian moon J 23

Solar System

Amateur Astronomer Finds “Lost” Moons of Jupiter

An amateur astronomer has recovered four of five "lost" Jovian moons.

Celestial News & Events

This Week's Sky at a Glance, January 8 – 16

Twilight challenge: the planet-conjunction finale! Jupiter and Saturn are becoming ever harder to pick up low in bright twilight, but bring those binoculars on Saturday Jan. 9th. Because then they'll be three! Mercury is emerging to join them. It will pass by them for a couple more days.

Artist’s impression of a binary neutron star and the gravitational waves the system emits.

Professional Telescopes

How to Warn of Imminent Neutron Star Collisions

What if gravitational-wave observatories could send out alerts right after — or even before — receiving signals of neutron star collisions?

Deep-sky map Capella region

Night Sky Sights

Foraging for Deep-sky Delights with Capella, the Goat Star

We explore deep-sky riches within a stone's throw of Capella, one of the season's brightest stars.

Kochab in the Little Dipper

Night Sky Sights

Meet Kochab, a Guardian of the Pole

Meet the stars: Kochab is no record-breaking bright star, but it's easy enough to find — and it may have played an important role through history.

The Hyades open star cluster

Night Sky Sights

January: The Hyades & Pleiades

Start the new year right with the easy-to-follow stargazing highlights offered by our Sky Tour astronomy podcast. Here's a preview of this month's guided audio tour.

Artemis-1

Space Missions

Space Missions to Watch in 2021

The coming year will feature three space missions arriving at Mars, the launch of SLS and James Webb, and much more.

Astronomy & Observing News

Top Astronomy News Stories of 2020

This has been a year rocked by a global pandemic that has left its mark on nearly every aspect of society. Wildfires, social unrest, and loss have only added to our sense of struggle. Yet it has also been a year of celestial wonders, astronomical discoveries, and space successes. We…

Leonid fireball crossing Orion

Night Sky Sights

The Best Meteor Showers in 2021

Sky & Telescope predicts that the year's best meteor shower will be the strong, fireball-rich Perseids in mid-August.

Orion Nebula and the Running Man Nebula

Celestial News & Events

What to See with Your New Telescope During 2020 Holidays

Maybe you just got a shiny new telescope. Awaiting you are stupendous, faraway things in the night sky. Surely you're itching to try it out....

Aldebaran vs. the Sun

Night Sky Sights

Meet Aldebaran, the Bull’s Eye

Learn more about Aldebaran, the red-orange giant star that "follows" the Pleiades across the sky.