标题: 【国家地理杂志片段】Sky Show This Weekend: Venus to Meet Elusive Mercury [打印本页] 作者: yush 时间: 2010-4-2 14:40 标题: 【国家地理杂志片段】Sky Show This Weekend: Venus to Meet Elusive Mercury ! {; \% p' l6 ]6 i" E1 B. H. X: w: C h/ G
A sky-watcher gazes at Mercury (lower left) and Venus in the evening sky over Germany in October 2009.- r' B" c& X8 a" e
6 |: e( X! i x* @- eAndrew Fazekas$ |" F' O4 k5 ?% V$ e$ y
for National Geographic News9 B& K, E+ A: y6 F# J
Published April 1, 2010 : f7 h# T' m" w' ]7 nNormally elusive, Mercury will be a "star" for most of April, shining brightly near Venus above the evening skyline. 7 t U% P& H6 K( p; HBoth planets will be visible to the naked eye for the next two weeks as bright, starlike objects that will dominate the low western sky shortly after sunset.+ G' B; `" I6 K# B5 m
"From a place with a low horizon, one should be able to get a nice view of these two planets hanging in the darkening sky like gems," said Geza Gyuk, staff astronomer at the Adler Planetarium in Chicago.0 L k, Y, u* r$ j B+ ?
As the cosmic duo climb higher, the'll reach conjunction—their closest approach to each other—on Saturday and Sunday. " S% ~# V/ }: ^5 B! `- q8 _1 lThose nights the two planets will seem to be separated by only three degrees, or the equivalent of six full-moon disks. 5 q! ~( V' d' _. c: NVenus Guides Eyes to Mercury O$ g$ M, |& R; s, tOf the five planets visible to the naked eye, Mercury is usually the most challenging to see, because it never wanders far from the sun./ B; H! l) j: p; q) Q3 B7 {/ p* F
The innermost planet, Mercury orbits the sun so closely that a year lasts just 88 Earth days. (See pictures of Mercury taken by a passing spacecraft.) 6 y- I H( ~) C( l( w) X/ U( Q# FAs seen from Earth, Mercury tightly hugs the horizon, and it appears faint because it's swathed in the sun's glare. % p% g4 ^2 w/ _0 d3 ], m"Most people never get to see Mercury, because it ... isn't very bright. But this conjunction is coming around Mercury's maximum elongation [the planet's farthest angle away from the sun] of 20 degrees on April 8," Gyuk said." F! {" {3 ?9 j
Brilliant Venus will serve as a guidepost for sky-watchers to easily find tiny Mercury. (Related: "Neptune Easier to Spot Now, Thanks to Jupiter.")7 M7 G/ k% [% _/ U" ?1 r- S( x
"Weather permitting," Gyuk said, "I'm certainly going to be out with my kids looking for Mercury!"9 E5 Q9 l. s2 Z Full Planetary Collection; ?! \; f) S2 i0 j
As an added bonus, planet-hunters already out to spy Venus and Mercury will be able to see all five naked-eye planets in a single night. * T! k, M- W% a8 _" I. u, BAs darkness sets in, Mars will become visible directly overhead, appearing as a red-tinged, starlike object. A little later, Saturn will appear slightly above the eastern horizon and will rise higher during the night. . c6 i% ~% n- C1 F& v9 S7 O5 [(Related: "Sky-watcher Beware: Mars Email a 'Spectacular' Hoax.")! k+ P8 s4 d5 s* I' n/ O- b
Finally, the gas-giant planet Jupiter will rise in the east just before sunrise作者: voko 时间: 2010-4-2 15:12
这也是悬赏翻?作者: yush 时间: 2010-4-2 15:24 标题: 我们带头来做个谋杀艺术3的专题吧 [s:70] 是悬赏 带斜体的都是 , a( P: I3 D$ b0 Z3 B- L- S* J. I' d @5 Q3 I2 j+ B+ r7 z我们带头来做个谋杀艺术3的专题吧9 p& k5 r. |" }& A
等你有空你先来开帖好吗作者: voko 时间: 2010-4-2 23:00 标题: 回 2楼(yush) 的帖子 额 我想想~我尽快~
