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Spitzer space telescope takes a picture of galaxy NGC 7331.

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Spitzer space telescope.
The Spitzer space telescope has taken a picture of a Galaxy called NGC 7331.

Saturn's Rotation is a Mystery.

Here's a simple question: how long is a day on Saturn? The answer, it turns out is very complex. Cassini recently measured its day at just over 10 hours and 45 minutes, but this is a full 6 minutes longer than the Voyager spacecraft measured. If this is correct, Saturn has slowed down 1% in only 23 years. Length of day is usually measured by a radio telescope, watching as the magnetic field sweeps around. With Saturn, however, it looks like the planet isn't locked to its magnetic field, which can slip around to different latitudes.

Spitzer space telescope - Galaxy NGC 7331.

The Spitzer space telescope has taken a picture of a Galaxy called NGC 7331; Astronomers believe it's a virtual twin of our own Milky Way galaxy. Since we're inside our galaxy, many of its interesting features are shrouded by dust, so looking at NGC 7331 is like looking into a mirror 50 million light-years away. Spitzer's Infrared spectrograph has revealed that our twin seems to have an unusually high concentration of massive stars at its centre, or a moderately active supermassive black hole, similar to the one at the heart of our own Milky Way.

Sea Launch Sends Telstar 18 Into orbit.

A Zenit-3SL rocket lifted off from the Sea Launch platform today, carrying a Telstar 18 satellite into orbit. The rocket launched at 0359 UTC (11:59 pm EDT June 28), but a glitch put the satellite into a transfer orbit that was lower than expected. Engineers think that they should still be able the satellite into its final orbit using station-keeping thrusters, which will shorten its lifespan. Telstar 18 will provide broadcast satellite services to East Asia and the Pacific Ocean.

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