41–60 of 70 results

Astronomy & Observing News

Goodbye, Pluto. Hello, "Dwarf Planets"!

It's official: our solar system has eight planets, and Pluto is not one of them according to the International Astronomical Union.

Astronomy & Observing News

Giant Telescopes of the Future

Telescopes as large as 20, 30, and even 100 meters are now on the drawing boards.

Astronomy & Observing News

Galaxy Maps Reveal Nature of Universe

The latest results from two comprehensive galaxy surveys independently confirm the important role of dark matter and dark energy in the evolution of the cosmos.

Astronomy & Observing News

A Black Hole Swarm

In this Chandra X-ray Observatory image of the galactic center, the four labeled sources are bright and variable. They are probably binary systems consisting of a stellar-mass black hole and a normal star. The Milky Way's central black hole, known as Sagittarius A*, is the bright spot above source C.Courtesy…

Astronomy & Observing News

A Planet Found Through Asteroid Belts

Orbiting Beta Pictoris farther than Saturn orbits the Sun, an unseen planet is apparently shaping the star's asteroid belts.

Astronomy & Observing News

LOFAR: A Giant Radio Telescope Takes Shape

Fifteen thousand humble little antennas will work in concert to form one of the world's most powerful astronomical instruments.

Astronomy & Observing News

Astro News Briefs: May 31–June 6

Tiny-tiny galaxies and activity minima in Sun-like stars.

Astronomy & Observing News

Nearby Remnant of a Gamma-Ray Burst?

What looks like a supernova remnant on the far side of the Milky Way could be the shattered remains of something bigger.

Astronomy & Observing News

Seeing the Very First Galaxies

The first stars to light up the universe after the Big Bang did not appear in a simple, expected way.

Astronomy & Observing News

Spitzer Exposes Mystery Holes

Taking its deepest-yet look into the infrared sky, the Spitzer Space Telescope pulls some mysterious objects out of hiding.

Astronomy & Observing News

Mysteries of the North Star

Polaris is not only a variable star, its variations are varying. And no one quite knows why.

Astronomy & Observing News

Lensed Quasars Hit the Charts

In the span of three weeks, astronomers twice smashed a record that had stood since 1979.

Astronomy & Observing News

Making Planetary Nebulae

It make a dying double star to create a planetary nebula — and to make it light up.

Astronomy & Observing News

Hubble's Really Big Picture

By stitching together 78 high-resolution Hubble Space Telescope photos, astronomers have created Hubble's widest "deep field."

Astronomy & Observing News

Finding Our Nearest Stellar Neighbors

Astronomers are trying to hunt out everything that exists within 32 light-years of Earth.

Astronomy & Observing News

Diving Globular Cluster Makes a Starry Splash

Did a globular star cluster passing through the Milky Way cause new stars to form?

Astronomy & Observing News

Refining the Cosmic Recipe

The Sloan Digital Sky Survey has helped provide astronomers with a more detailed map of the universe.

Astronomy & Observing News

Cassini Proves Einstein Right — So Far

Radio links with the Cassini spacecraft show Einstein's general theory of relativity to be correct to one part in 40,000. But new physics could show up just a little beyond.

Astronomy & Observing News

Monster Gamma-Ray Burst

A few days ago we got hit by the nearest major gamma-ray burst ever. It was bright enough that many amateur astronomers imaged it.

Astronomy & Observing News

Hubble Captures a Protoplanetary Disk

Spiral rings appear in a young star's dusk disk that's ten times larger than our solar system.

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