2011年1月27日星期四

the largest possible Eris is still smaller than the smallest possible Pluto

The results are still being published, but Drs. Alain Maury and Bruno Sicardy, both of which witnessed the event, say that the largest possible Eris is still smaller than the smallest possible Pluto.Would Doc Brown been so keen to kill off Pluto had he known Eris was smaller?”Maybe,” Dr. Brown said, although as he tells in his unapologetically replica Movado 605097 WoMen's watch titled book “How I Killed Pluto and Why It Had It Coming,” he thinks the International Astronomical Union got it right.Everything is still up in the air (pardon the pun) regarding the two dwarf planets, mainly because we have no real way of knowing how large they truly are.Initials estimates by Brown had Eris at 2,400 kilometers in diameter.

Later, bouncing infrared light off of Eris had her measuring up at 3,000 kilometers. The latest measurements suggest a diameter somewhere around 2,360 kilometers.Pluto itself has been shrinking for years. We initially believed it to be the same size of the Earth. It's been steadily shrinking since then, much to the amusement of scientists.In replica Movado 605093 WoMen's watch 1980, Alexander J. Dessler, now at Texas A&M University, and Christopher T. Russell of the University of California, Los Angeles, published a graph of the mass estimates through the years and jokingly predicted that Pluto would disappear entirely in 1984. “Those of you interested in observing Pluto should hurry,” they wrote.

Why the different sizes? Well it's quite far away. You try measuring it. Can you? No? There you go.Various methods have been attempted with obviously varied results. Some suggest the atmosphere of Pluto bends light, which would make it even more difficult to measure correctly.Still, the range of possible Pluto sizes seems to replica Movado WoMen's Stainless Steel overlap the possible Eris sizes. “If you looked at the two of them right next to each other sitting in space, they would look to be exactly the same size,” Dr. Brown said. “You couldn't tell by eye until you took out your really, really big ruler.