On Dec. 29th in the mountains of northern Italy, Giampaolo Salvato took a picture of Comet 8P/Tuttle, see below, using no telescope at all. "This is a 5 minute exposure with my Canon 5D digital camera set at ISO 400," he says.
from spaceweather
NEW YEARS COMET: After a 13.6 year absence, Comet 8P/Tuttle is once again traveling through the inner solar system and on Jan. 1st and 2nd it makes its closest approach to Earth--only 24 million miles away. The emerald-colored comet will brighten to a predicted magnitude of 5.8, visible to the unaided eye from dark-sky sites and a fine target for backyard telescopes: sky map.
On Dec. 29th in the mountains of northern Italy, Giampaolo Salvato took a picture of Comet 8P/Tuttle, see below, using no telescope at all. "This is a 5 minute exposure with my Canon 5D digital camera set at ISO 400," he says.
Click on the image for an even wider view, which encompasses exploding Comet 17P/Holmes, variable star Algol, the Andromeda Galaxy (M31) and some lovely star clusters. Comet Tuttle is racing across this starry expanse for a Dec. 30th encounter with spiral galaxy M33--a can't-miss event for astrophotographers. Stay tuned for photos!
内容很丰富的一张图，呵呵
注：Almach ——仙女座γ星 天大将军一
来源：http://www.spaceweather.com/swpod2007/29dec07/Giampaolo-Salvato1.jpg
[ 本帖最后由 Eldghost 于 2007-12-30 18:53 编辑 ] |
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