By Patricia Barnes-Svarney
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Additional info for Asteroid: Earth Destroyer Or New Frontier?
Photo courtesy of NASA) lands and may have precipitated the volcanic flooding of the major impact crater basins-developed from a different population of impacting bodies. Extrapolation of the dates on the Moon also led to closer looks at crater-covered Mercury and more sparsely cratered Mars. On both these worlds, crater counts revealed the same message as on the Moon. 8 billion years ago. In fact, when analyzing the relative size-frequency distribution of the lunar highlands and Mercury, they are very TIGHTEN THE BELT 41 similar, which means that they were probably cratered by the same population of impacting bodies.
There are also clumps within the rings, thought to be caused by the influence of the moons. (Photo courtesy of NASA) ~ ~..... ,~ o;;a r:i;;a ~ ~ o ~ ): 9 ~ ~ ~ THE PLANET THAT NEVER WAS? 0 astronomical units). ) like minions to the gas giant. They are located at the Lagrange points 4 and 5 (or L4 and L5 points). One group orbits 60 degrees ahead of Jupiter, called the Achilles Group; and the other group orbits 60 degrees behind Jupiter, called the Patroclus Group-named after the combatants in the Trojan war.
And so far, all measurements seem to indicate the "right" amount of deuterium to support the Big Bang, though more observations are needed to confirm the findings. 3 Cosmologists also believe that cosmic microwave background radiation is compelling evidence for the Big Bang. Cosmic microwave radiation-or very high-frequency radio waves with wavelengths between 1 millimeter to 1 meter on the electromagnetic spectrum-was discovered coming from space in 1964. Arno Penzias and Robert Wilson, two scientists at Bell Laboratories, were measuring microwave radiation, converting a large radio antenna for astronomical purposes.