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Originally posted by Neo Christian Mystic
The Shoemaker-Levi impact was not too long ago, are we seeing an increased frequency of impact with highly energetic objects in the solar system, and especially planet Jupiter? Quite scary stuff if you ask me.
[edit on 4/6/2010 by Neo Christian Mystic]
I think I read somewhere a while ago about a nuke (12megaton?) who was/is supposed to hit jupiter.
At the time it was just speculation about a black op I think, but it was the first thing I thought about when I read this. If it was a large object, they would have found it before this happened, right?
Originally posted by Saint Exupery
The technique for finding extrasolar planets favors finding massive gas giants in close orbit around stars. The astronomers measure the gravitational influence of the planet on the star over time. The closer the planet is to the star, the greater the influence, so the easier it is to detect.
For scientists who spend time thinking about how planets form, life would be simpler if gas giants like Jupiter and Saturn didn't exist.
According to the standard model of planet formation, called "core accretion," planets form over millions of years as enormous blocks of rock and ice smash together to form planetary embryos, called "protoplanets," and eventually full-fledged planets.
Most scientists agree that core accretion is how terrestrial planets such as Earth and Mars were created, but the model can't convincingly explain how gas giant planets like Jupiter and Saturn came to be.
One major problem is that developing gas giants through core accretion takes too long. According to the best current models, the process requires several million years-longer than the typical observed lifetime of the stellar gas disks from which planets are born.
The other main difficulty is the so-called "migration" problem. Protoplanets are not sitting stationary in the gas disks as they bulk up. Due to gravitational interactions with the disks, the protoplanets swirl rapidly inwards toward their central stars in what scientists call "Type 1" migration. Models predict that this death spiral can take as little as 100,000 years. This so-called "migration" problem is the toughest challenge facing theorists trying to explain gas giant formation through core accretion, said Alan Boss, a planet formation expert at the Carnegie Institution of Washington.
Originally posted by GBP/JPY
also, the second brown belt went missing a month ago...the seb south equitorial belt which has always been visible even with binocs....this has everyone baffled. now you find this....