《科学》[Science]12年5月11日出版pdf全文

nero1981

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' m& u) L' k" W2 N6 \COVER Enhanced-color view of the "Snowman" craters (Marcia, Calpurnia,
$ y0 w) W3 o9 S7 k0 Dand Minucia) on the asteroid Vesta generated by combining imaging and topography 6 d5 c) B; Q. L$ [! o6 k
data from NASA's Dawn spacecraft. The 60-kilometer-wide Marcia crater (at ' a  X/ c0 @7 m( ^
bottom) is one of the youngest large craters on Vesta with a small central peak,
$ o4 A* x% I, H1 g1 ?% {as well as light and dark streaks on its walls. See the series of six Reports
* R+ `6 J% r5 ]  `0 U% C- l- C: Ybeginning on page 684. Image
9 ^% [. P, ?: w6 ngenerated using Dawn Framing Camera images: Lucille Le Corre (MPS), David 9 ~2 m1 }" W3 T; h6 h
O'Brien (PSI), Vishnu Reddy (MPS/UND); PI of Dawn mission: Christopher T.
1 V% q; T9 M! g$ I" L3 w! vRussell (UCLA); Dawn Framing Camera leader: Andreas Nathues (MPS), significant
% S% k: R9 D9 K, e* R" ~3 ncontributions from Ralf Jaumann (DLR) 8 M2 s% D* F3 z7 U- F( t: W/ s

6 L" A# X9 _; d: d  ~1 O1 P- L[hide][/hide]

yuhaoze

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