Sentences with phrase «by a comet breaking»
The glass itself, one large polished piece of which has a prominent place in a necklace that belonged to Egyptian pharaoh Tutankhamen, has been dated to 28.5 million years and has long been thought to be the result of a meteorite impact or an airburst caused by a comet breaking up in Earth's atmosphere.
http://www.sciencemag.org/ Not exact matches
Because the Explorer was «very tenuously held by Earth,» says Farquhar, it was relatively easy to break that connection in 1982 and send the craft off on an unplanned mission — to fly through the tail of the comet Giacobini - Zinner.
THE sight of the solar system's biggest planet being battered by the broken remains of a comet in 1994 left a vivid reminder of our own planet's vulnerability.
As comets pass through the inner solar system, they can be broken into pieces by Jupiter's gravity.
Given that Tau Ceti does not appear to be a young star, the ring of dusty debris is believed to be produced by collisions between larger comets and asteroids that break them down into smaller and smaller pieces, and Tau Ceti's disk is similar in size and shape to the disk of comets and asteroids that orbits the Sun, Sol.