23:15 A powerful 6.8 earthquake has rocked central Myanmar, only hours after the 6.2 earthquake that shook Italy.

21:55 Dozens of people have been killed in Italy's devastating 6.2 quake, with search efforts to free buried people underway.

21:12 Fire-staff are still fighting to extinguish a blaze that has claimed a life in Fielding.

17:24 Daybreak in Italy has revealed the extent of the devastation following a powerful earthquake in the central region of the country.

17:22 A man has been taken to Christchurch Hospital after being crushed by a digger at a worksite in Mt Pleasant shortly after three o'clock.

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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