这些数据哪里来的? 靠得住吗?
这段文字来自NASA网站11日的新闻,提到8日的图片,亮度1.5--1度。
Comet ISON shines in this five-minute exposure taken at NASA's Marshall Space Flight Cent
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发表于 2013-11-13 22:12
Comet ISON shines in this five-minute exposure taken at NASA's Marshall Space Flight Center on Nov. 8 at 5:40 a.m. EST. The image has a field of view of roughly 1.5 degrees by 1 degree and was captured using a color CCD camera attached to a 14" telescope located at Marshall. At the time of this picture, Comet ISON was 97 million miles from Earth, heading toward a close encounter with the sun on Nov. 28. Located in the constellation of Virgo, it is now visible in a good pair of binoculars.