08:17 Judith Collins is adamant she's still in National's leadership race with Bill English and Jonathan Coleman

06:15 At least 14 people have been killed in Thailand after days of torrential rain.

05:19 Prices have risen again at the latest global online dairy auction - with the important whole milke category up nearly five percent.

05:18 Prosecutors say murder charges are possible in connection to the warehouse fire during a rave in California which has killed more than 30 people.

05:17 US President-elect Donald Trump wants to cancel the purchase of Boeing's new Air Force One plane saying it's too expensive.

Fri, 13 Apr 2012

VIDEO: Why don't those stars move?

Stars in the sky will typically appear to rise and set as the Earth turns. If you look closely at the above time-lapse movie, however, there are points of light that appear stationary. These objects are not stars but human-launched robotic spacecraft that remain fixed high above the Earth's equator. Called geostationary satellites, they don't fall down because they do orbit the Earth -- they just orbit at exactly the same speed that the Earth rotates. The orbital distance where this is possible is much farther than the International Space Station but much closer than the Moon. The video was taken from one of the highest revolving restaurants in the world located on the Mittelallalin in the Swiss Alps. An even closer inspection will show that the geostationary satellites flash with glints of reflected sunlight. The satellites also all appear on a single line - actually the projection of the Earth's equator onto the sky.

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