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February 20, 2007: One pole of the sun is cooler than the other. That's the surprising conclusion announced today by scientists who have been analyzing data from the ESA-NASA Ulysses spacecraft.

Space Shuttle Atlantis hangs suspended in its sling in the transfer aisle of the Vehicle Assembly Building. Preparations are underway to lift the vehicle up into high bay 1, where it will be lowered onto the mobile launcher platform for mating to the external tank and solid rocket boosters.

The arrest of astronaut Lisa Nowak for attempted murder this week has raised questions about NASA's policies on safeguarding the emotional welfare of its staff. Astronauts undergo rigorous psychometric evaluation on their recruitment, in an attempt to screen out those who might crack under pressure. But can psychological monitoring really ensure that staff are emotionally sound and ready to fly?

A new cosmic map confirms a close relationship between galaxies with supermassive black holes at their centers and the distribution of the invisible dark matter in the early universe.

The next group of people to experience launching aboard one of NASA's space shuttles won't be astronauts. While NASA has June 8 planned for its next liftoff from Kennedy Space Center's Pad 39A, just seven miles away thousands at NASA's official visitor complex will have the opportunity to board the new Shuttle Launch Experience (SLE), opening on May 25.