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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.

Astronomy & Observing News

Interstellar Reflections

New images from the Hubble Space Telescope reveal unprecedented detail in a light echo expanding around an explosive variable star in Monoceros.

Astronomy & Observing News

Did Pluto Take a Punch?

A Hubble Space Telescope image snapped in 1994 easily resolves Pluto and its moon, just 0.9 arcsecond apart. Charon's orbit is about 39,300 kilometers in diameter — but astronomers are surprised that it's not a perfect circle.Courtesy R. Albrecht (ESA/ESTEC) and NASA. If David J. Tholen (University of Hawaii) is…

Astronomy & Observing News

Looking for HEROs

The light from a very distant Hyper-Extremely Red Object, designated HERO1, has been redshifted so much that it can be seen in the near-infrared (right) but not at visible wavelengths (left). HERO1 is located in the sky very close to a radio source, known as 53W002, that is more than…

Astronomy & Observing News

Super Sunspot Images

Using adaptive optics, a new solar telescope in the Canary Islands is taking the best-ever pictures of the Sun.

Astronomy & Observing News

Star Speeds Around Milky Way's Black Hole

Astronomers have clocked a star orbiting the black hole at the Milky Way's center, revealing its mass.

Astronomy & Observing News

Making Millisecond Pulsars

A three-hour long burst on a neutron star has confirmed many long-suspected fact about the dense, spinning stars.

Astronomy & Observing News

Are Dormant Quasars Throwing "Baseballs" at Us?

Ultrahigh energy cosmic rays may come from quasars that were thought to be retired.

Astronomy & Observing News

Closing In on Neutrino Properties

The heart of the Sudbury Neutrino Observatory is an acrylic sphere filled with heavy water and surrounded by photomultiplier tubes. These detect flashes of light produced when neutrinos interact with the water. This fisheye view was taken from beneath the sphere before the bottom panel of detectors was installed.Courtesy Ernest…

Astronomy & Observing News

Planet Going Up in Smoke

Like a giant comet, the "hot Jupiter" crossing the face of the star HD 209458 is blowing off vast clouds of hydrogen.

Astronomy & Observing News

A Recent Asteroid Crackup

Most asteroids are just pieces of their former selves. Now astronomers have traced back 39 of them to one collision.

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