Showing posts with label crater. Show all posts
Showing posts with label crater. Show all posts

Large Asteroid Craters Found in Australia

Australia has always been seen as remote. Yet new new things are being discovered about its history. It has been identified as the "target" of one of the world's largest asteroid impacts. Two craters found by Andrew Glikson and his team are thought to have been caused by a large meteor which broke into two pieces.
Dinosaurs killed extinct by asteroid
Each crater is 200 kilometers in diameter. One of these craters on its own is larger than the impact in Mexico: the Central American collision wiped out the dinosaurs. It isn't the biggest, however. The Sudbury comet did a great deal of damage, but the world's widest crater is the Vredefort in South Africa.

The twin craters in Australia have been flattened out over eons of time. They were found by geothermal research. It appears that asteroid impact covers the Northern Territory, Queensland and South Australia, a very large area. Seismic traverses is going to be applied next. This will hopefully bring new things to light.

If the asteroid damage in Mexico caused mass extinction, the severe disruption in Australia would have destroyed life as well. Its age has not yet been determined. The question is: Did the dinosaurs survive the catastrophe or were they long gone by then?
Technology by Ty Buchanan
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Survey Vehicle Reaches Mercury

A NASA space vehicle, New Messenger, has reached Mercury and is beaming back information to CSIRO's Canberra Deep Space Communication Complex. It has taken nearly seven years to get to the hot inner planet. A Mercury day is six Earth months long while its year is only 88 days.

There is no possibility of humans landing on this little planet as the temperature reaches 430 degrees. Its minimum is extreme as well, minus 180 degrees. The sun would look three times bigger than on Earth if you could stand on it surface and look at it that is.

An earlier exploratory vehicle, Marina 10, only gave a cursory look at the innermost planet. The whole planet is to be mapped this time. It will show whether there is ice at the poles. The sun never shines into pole craters. A mystery to be solved is why Mercury is composed mainly of metals.
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