Year of the Comet
Comet C/2011 L4 (PANSTARRS)

PANSTARRS information

Comet C/2012 S1 (ISON)

ISON information

Astronomy News

Your online destination for news articles on planets, cosmology, NASA, space missions, and more. You’ll also find information on how to observe upcoming visible sky events such as meteor showers, solar and lunar eclipses, key planetary appearances, comets, and asteroids.

July 2004
Centaurus A (NGC 5128)
The globular clusters in galaxy NGC 5128 include the most massive ones known. Astronomers are hoping they can illuminate the galaxy's history.
By Robert Burnham
Published: July 29, 2004
Landsat image of Popigai impact crater
Two 35-million-year-old impact craters hint at the possibility of asteroid showers.
By Robert Burnham
Published: July 29, 2004
Lunar meteorite in Oman
A meteorite found in Oman in 2002 can be traced back to the Imbrium basin and the crater Lalande on the lunar nearside. The meteorite's history may compel scientists to revise the Moon's early chronology.
By Robert Burnham
Published: July 29, 2004
Black hole in accretion disk
Volcano seasons, Chicxulub impact winter, black hole filling, and more
Published: July 29, 2004
Solar spicules and active region 10380
Gurgling plasma on the Sun produces periodic, supercharged jets.
By Laura Baird
Published: July 28, 2004
Abell 2218
Dark energy may arise from the interaction of neutrinos and a hypothetical particle.
By Francis Reddy
Published: July 27, 2004
Galactic collection
Hubble image shows an assortment of galaxies — and an optical illusion.
By Jeremy McGovern
Published: July 23, 2004
Ringscape in color
Cassini shoots a color image of the rings.
By Pamela Zerbinos
Published: July 22, 2004
Large Magellanic Cloud
Why does the Large Magellanic Cloud have two populations of globular star clusters separated in age by 10 billion years? New theoretical work suggests an answer.
By Robert Burnham
Published: July 19, 2004
Guitar Nebula
Astronomers find a pair of runaway pulsars that once formed a binary star system.
By Robert Burnham
Published: July 19, 2004
American Astronomical Society logo
The largest organization of professional planetary scientists in the world names winners of annual awards.
By Jeremy McGovern
Published: July 16, 2004
Saturn's rings in UV
Cassini sees Saturn's rings in a different light.
By Francis Reddy
Published: July 8, 2004
MOST
Canada's space telescope spies on stars as they spin and shake.
By Andrew Fazekas
Published: July 7, 2004
Orion Nebula (M42)
A European Southern Observatory image showcases one of the nearest regions of star formation.
By Jeremy McGovern
Published: July 7, 2004
Composite of Titan's surface
Cassini's distant flyby of Titan reveals a landscape like no other.
By Francis Reddy
Published: July 5, 2004
Cassini arrives at Saturn
Cassini-Huygens made a picture-perfect arrival at the ringed planet.
By Robert Burnham
Published: July 1, 2004
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