时间:2026-10-31 23:35:23 来源:网络整理编辑:綜合
We may never leave our Milky Way galaxy and see it from the outside, but the Hubble Space Telescope
We may never leave our Milky Way galaxy and see it from the outside, but the Hubble Space Telescope at least helps us imagine that view.
A newly shared Hubble image that NASA posted on Friday takes a look at NGC 3432. This not-too-distant celestial body (it's only 42 million light-years away!) is a spiral galaxy much like Earth's own Milky Way. But because of where we are and how it's situated, Hubble's photo amounts to a side view.
Tweet may have been deleted
You might be wondering how we even know this is what a spiral galaxy looks like from the side, since we're only able to look at it (and pretty much every other distant thing in outer space) from one angle. NASA, as it turns out, has some experience in the arena of looking at space photos.
"Dark bands of cosmic dust, patches of varying brightness and pink regions of star formation help with making out the true shape of NGC 3432 — but it’s still somewhat of a challenge," NASA's Friday post reads. "Because observatories such as the NASA/ESA Hubble Space Telescope have seen spiral galaxies at every kind of orientation, astronomers can tell when we happen to have caught one from the side."
If you're anything like me, this photo also got you wondering how we could possibly know that the Milky Way is a spiral galaxy. I'm sure it's been addressed elsewhere, but I found an explanation on Cornell's website from former student Sara Slater, who studied physics at Harvard and now works as a researcher at M.I.T.'s Kavli Institute.
Although we don't have a way to actually snap a photo of the Milky Way, Slater points to three clues that out our home galaxy's general shape. First, researchers are able to make out the galaxy's rough shape in silhouette by looking to the galaxy's center. Our view of it is similar to Hubble's edge-on look at NGC 3432, with the Milky Way appearing as a long, thin strip with a bulge at the center.
SEE ALSO:Gorgeous rose-colored Hubble photo is your daily reminder that space is super cool"This is a bit of a tipoff," Slater wrote. She also noted that the measured velocity of stars and gas in our galaxy suggests "an overall rotational motion that differs from random motions," and that's "another characteristic of a spiral galaxy." And finally, the observed gas and dust content of the Milky Way also falls in line with that of other spiral galaxies.
"So, overall, it's a pretty convincing argument," Slater concluded. "Of course, we have to assume our galaxy is not completely unlike the other galaxies we see—once a civilization has accepted that it does not occupy any special place in the Universe, arguments about similarity seem sensible."
The U.S. will no longer have the final say on internet domain names2026-10-31 23:17
世界杯16強產生14席 ,12隊被淘汰 ,德國出局 ,日本擊敗西班牙出線(2021年歐洲足球八強)2026-10-31 22:57
英格蘭隊3:0戰勝威爾士隊晉級16強(英格蘭32026-10-31 22:55
【波盈足球】 世足C羅8強戰有望重回先發 葡主帥籲媒體「別再纏著他」 ( 摩洛哥,葡萄牙 )2026-10-31 22:38
Early Apple2026-10-31 22:35
【波盈足球】 世足巴西怎輸的?克羅埃西亞後衛揭3個關鍵原因 ( 德裏,巴西 )2026-10-31 22:14
日本小組第一出線 ,德國出局;16強即將全部確定(德國晉級16強)2026-10-31 21:56
韓國竟然晉級了 ?C羅和葡萄牙複仇失敗了!葡萄牙放水了?(葡萄牙和韓國哪個大)2026-10-31 21:48
Olympics official on Rio's green diving pool: 'Chemistry is not an exact science'2026-10-31 21:34
【波盈足球】 世足阿根廷違規事件遭FIFA調查 球迷憂梅西遭禁賽 ( 阿根廷,黃牌 )2026-10-31 20:49
Richard Branson 'thought he was going to die' in bike accident2026-10-31 23:27
德國贏球仍遭淘汰 連續兩屆世界杯小組未能出線(德國世界杯八強)2026-10-31 23:14
【波盈足球】 世足梅西慶幸首戰輸給沙烏地 :助我們上緊發條 ( 阿根廷,首戰 )2026-10-31 23:11
【波盈足球】 阿根廷PK險勝荷蘭晉世足4強 梅西賽後怒轟裁判 ( 阿根廷,荷蘭 )2026-10-31 22:58
Balloon fanatic Tim Kaine is also, of course, very good at harmonica2026-10-31 22:57
2022 年卡塔爾世界杯小組賽拉什福德梅開二度,英格蘭 3:0 輕取威爾士 ,如何評價本場比賽?2026-10-31 22:45
西班牙出局 、葡萄牙晉級,卡塔爾世界杯八強全部產生(卡塔爾世界杯12強賽排名)2026-10-31 22:01
12 月 1 日世界杯小組賽,阿根廷 vs 波蘭 ,梅西 PK 萊萬,你對該比賽有哪些期待 ?(阿根廷2:0卡塔爾)2026-10-31 21:56
Katy Perry talks 'Rise,' her next batch of songs, and how to survive Twitter2026-10-31 20:59
【波盈足球】 世足提早放假過得太愜意? 德國門神諾伊爾滑雪意外摔斷腿 ( 伊爾,拜仁 )2026-10-31 20:51