推 pistons0604: 長知識惹 07/13 23:52
推 napa680: 上面的亮點是？ 07/14 10:55
NASA批准dawn太空船進入延伸任務，繼續繞穀神星進行觀測。
http://dawn.jpl.nasa.gov/mission/status.html
June 30 - Dawn Completes Prime Mission and Continues Observing Ceres
Today marks the official conclusion of Dawn's prime mission, which began when
the spacecraft left Earth on September 27, 2007. The mission has far
surpassed all of its objectives for exploring protoplanet Vesta and dwarf
planet Ceres. Some interesting statistics and other information on the prime
mission are here.
Dawn transmitted a large volume of scientific data to Earth on June 27-28,
and it is continuing to observe Ceres even as the prime mission concludes. On
July 1-2, it will transmit more pictures and spectra from its final mapping
orbit at an altitude of 240 miles (385 kilometers).
July 6 - Dawn Exploring Ceres in Extended Mission
NASA Headquarters approved an extension of Dawn's mission at Ceres, taking
advantage of the probe's capabilities to continue making discoveries about
the nature of this fascinating dwarf planet.
Dawn has been acquiring more stereo images and gathering additional
information with all of its spectrometers. The spacecraft began sending its
latest data to Earth early this morning, and it will continue until tomorrow
afternoon when it resumes its observations.
==
據報導dawn團隊曾向NASA送出一份提案，想要用目前還剩下的燃料飛到第三顆
小行星145 Adeona (導神星)，但是被NASA否決。NASA認為繼續觀測穀神星的價值
比起飛到導神星來的更高。
==
我個人是覺得NASA的決定沒錯，而且飛到導神星的風險遠比繼續繞穀神星來的高太多。
可是NASA以"不能汙染穀神星"為理由，拒絕讓dawn太空船降低繞穀神星的高度，這我就
不知道要怎麼個觀測法了，畢竟降低高度才有辦法提高穀神星觀測的解析度。
==
順便恭喜朱諾號入軌成功，以及期望新視野號能成功觀測2014 MU69古柏帶天體。
--
是啊.....我只是個人魚.....
無法跟王子結合，我...我的命運就是化成泡影而死去。
辛蒂公主是個好女孩，祝你們永遠幸福！
還有一件事就是....
偶爾...也請想想我.....
ＡＩが止まらない
--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 118.165.130.195
※ 文章網址: https://www.ptt.cc/bbs/sky/M.1468419040.A.0EB.html