1. Astronomy

    Elliptical duet rides the Kuiper belt

    Follow-up observations of an icy object in the Kuiper belt and its moon reveal that the two bodies revolve about each other in the most elongated orbit of any pair of objects in the solar system.

  2. Astronomy

    Dusty Disks May Reveal Hidden Worlds

    Images of gaps, rings, arcs, warps, and clumps in disks of dusty debris surrounding nearby stars are providing new clues about the nature of planets that lie beyond the solar system.

  3. Astronomy

    Super Wallops: Tracking the origin of cosmic rays

    Two new studies shed light on the longstanding mystery of where cosmic rays—the energetic charged particles that bombard our galaxy—originate.

  4. Astronomy

    Strange Stars? Odd features hint at novel matter

    Two stellar corpses thought to be made of neutrons may actually contain weird forms of matter never observed before.

  5. Astronomy

    Cosmic Remodeling: Superwinds star in early universe

    New measurements reveal that some of the earliest galaxies in the universe produced winds so powerful and persistent that they blew material from one galaxy to another, temporarily separating dark matter from visible matter and profoundly influencing the evolution of future generations of galaxies.

  6. Astronomy

    Gamma-Ray Burst: A black hole is born

    New evidence supports the notion that gamma-ray bursts, the most violent explosions in the universe, are the primal calling cards of newborn black holes.

  7. Astronomy

    Galaxy Hunter

    At the interactive “Galaxy Hunter” Web site, students use data from the Hubble Space Telescope to investigate a bewildering assortment of deep-space galaxies in various stages of evolution–and learn statistical concepts such as sample variability and size along the way. Go to:

  8. Astronomy

    Long Ago and Far Away: Astronomers find distant galaxy, early cluster

    Peering ever deeper into space and further back in time, two teams of astronomers have uncovered new details about the earliest galaxies and galaxy clusters in the universe.

  9. Astronomy

    Repainting the cosmic palette

    After all the hue and cry about the color of the universe, astronomers have now revised their findings: It’s not pale green, but boring old beige.

  10. Astronomy

    Telescope Tuned Up: Back to work for orbiting observatory

    A rejuvenated Hubble Space Telescope floated away from the space shuttle Columbia on March 9 after astronauts spent a week renovating the observatory.

  11. Astronomy

    Rethinking an Astronomical Icon

    Examining the Eagle nebula's pillars of creation with infrared detectors, scientists are viewing an astronomical icon in a whole new light.

  12. Astronomy

    Martian equator: A watery outpost?

    A catastrophic outpouring of water—four times the volume contained in Lake Tahoe—may have gushed from fissures near the equator on Mars as recently as 10 million years ago.