5441–5460 of 6,712 results

Astronomy and Society

State Your Purpose

A collection of interesting views about the universe.

Astronomy and Society

The Red Planet We Never Knew

A new DVD entertains with a 50-year-old look at Mars.

Milky Way

Mira's Marvelous Tail

Mira, the closest and brightest of the red long-period variable stars, has thrown off a gassy hood and a comet-like tail so big that if you could see them, they would overflow your telescope's field of view.

Astrobiology

One Less "Possibility of Life"?

Just because Saturn's moon Enceladus has active geysers doesn't mean it harbors alien life. That's the take-home message from an upcoming scientific paper.

Cosmology

Bright Galaxies You Can't See

Astronomers have found massive, luminous infrared galaxies 12 billion light-years away. It's not at all clear how they got there.

Celestial News & Events

Uranus and Neptune in 2007

Sky & Telescope diagramThe solar system beyond Saturn has been much in the news in the last year, but just three of its denizens are visible in amateur telescopes. Binoculars readily show Uranus and, with a little more difficulty, Neptune. Pluto normally needs at least an 8-inch telescope and a…

People, Places, and Events

Risky Business

Two American collectors manage — barely — to get in and out of Colombia with fragments from a fresh meteorite fall.

Astronomy & Observing News

A Great-Grandfather Star

By measuring radioactive decay the same way geologists date rocks on Earth, researchers have pegged the age of a very ancient star in the Milky Way — independently of any other knowledge or assumptions about astronomy.

Astronomy & Observing News

The Coolest Dwarf

The infrared deep-sky survey now being carried out by the United Kingdom Infrared Telescope is only 5% done, but already astronomers looking at its data have found the coolest solitary brown dwarf ever seen.

Astronomy & Observing News

New Galaxy Redshift Record

Subtle wisps of galaxies with a redshift around 10 have been detected from the Keck Observatory in Hawaii, claims a group of Caltech astronomers.

Resources and Education

"New Star" in Vulpecula

On August 8, 2007, variable-star observer Hiroshi Abe discovered a 9th-magnitude nova in Vulpecula. The AAVSO seeks your observations.

Solar System

Do Sunspots Forecast the Rain?

A team of researchers claim that sunspot activity might accurately forecast rain in Africa.

Solar System

Do Sunspots Cycles Forecast the Rain?

A team of researchers claim that sunspot activity might accurately forecast rain in Africa.

Galaxies

Galaxy Monster Mash

Astronomers using a battery of ground- and space-based telescopes have stumbled upon the most massive galaxy smashup ever seen.

People, Places, and Events

Stellafane Auction Begins

A spirited bidding war is now under way for two precious artifacts: a prototype 13-mm Nagler eyepiece and Steve O'Meara's Tele Vue Genesis refractor.

Milky Way

Hubble Lifts the Veil

New images from the Hubble Space Telescope show parts of the Veil Nebula in Cygnus in unprecedented detail.

Astronomy and Society

Morphology @ Home

Thousands of people have signed up to study galaxies.

Milky Way

Stars that Smoke

Astronomers have resolved carbon soot clouds around one of the sky's best-known R Coronae Borealis–type variable stars.

Exoplanets

The Most Puffed-Up Planet

Astronomers have discovered possibly the biggest exoplanet yet. TrES-4 is about 70% wider than Jupiter and has the average density of balsa wood.

Celestial News & Events

Prepare for the Perseids

August is the best month to view meteors from the Northern Hemisphere. And conditions are ideal this year, with activity peaking on the new-Moon night of Sunday–Monday, August 12–13.