• Building Life from Star-Stuff

    Life on Earth was made possible by the death of stars. Atoms like carbon and oxygen were expelled in the last few dying gasps of stars after their final supplies of hydrogen fuel were used up.

  • Mystery Methane Maker

    The detections of methane in the martian atmosphere have challenged scientists to find a source for the gas, which is usually associated with life on Earth. One source that can be ruled out is ancient history: Methane can survive only 600 years in the martian atmosphere before sunlight will destroy it.

  • Weighing the Benefits of the I-suit

    Dr. Dean Eppler is a geologist at the Johnson Space Center in Houston, Texas. For the past eight years, Eppler has participated in field tests of experimental spacesuits as part of the Desert RATS (Research and Technology Studies) project. The suits are being tested to provide input to the development of flight-ready suits for future human missions to the moon and Mars.

  • Mars: Windows on the World

    In their explorations of Mars, both the Spirit and Opportunity rovers found evidence that liquid water was once on the planet’s surface. Joy Crisp, project scientist for NASA’s Mars Exploration Rovers, discussed the rovers’ long journey and their surprising discoveries at a public lecture on May 19, 2005.

  • Cassini Spies Enceladus’ Rolling

    NASA’s Cassini spacecraft has obtained new detailed images of the south polar region of Saturn’s moon Enceladus. The data reveal distinctive geological features and the most youthful terrain seen on the moon. These findings point to a very complex evolutionary history for Saturn’s brightest, whitest satellite.