# NASA每日天文一图

1. 4周前

### baishuxu

1楼 1月13日 天文版主
4周前baishuxu 重新编辑

NASA的APOD （NASA's Astronomy Picture of the Day）每天都会更新一张好看的天文图片，这个帖子就用来放APOD图片吧~

一楼将存档2019年1月1日至今天的APOD。

#### 每日天文一图

Astronomy Picture of the Day

2019 January 1

红外波段看到的草帽星系
The Sombrero Galaxy in Infrared

2019 January 2

WISE卫星拍摄到的红外波段的猎户座星云
The Orion Nebula in Infrared from WISE

2019 January 3

天涯和海角
Ultima and Thule

2019 January 4

旋转的『天涯海角』的动图
Ultima Thule Rotation Gif

2019 January 5

月球背面的『玉兔2号』
Yutu 2 on the Farside

2019 January 6

射向银河中心的激光
A Laser Strike at the Galactic Center

2019 January 7

金牛座方向的恒星、流星和彗星
Stars, Meteors, and a Comet in Taurus

2019 January 8

HESS Telescopes Explore the High Energy Sky

2019 January 9

象限仪座流星雨
Quadrantids

2019 January 10

船帆座超新星遗迹
Vela Supernova Remnant Mosaic

2019 January 11

北京看到的日偏食
Partial Eclipse over Beijing

2. ### baishuxu

2楼 1月13日 天文版主
4周前baishuxu 重新编辑

2019 January 12

疑是银河落九天
Milky Way Falls

Image Credit & Copyright : Yuri Beletsky (Carnegie Las Campanas Observatory , TWAN )

Explanation: It can be the driest place on planet Earth, but water still flows in Chile's Atacama desert, high in the mountains. After discovering this small creek with running water, the photographer returned to the site to watch the Milky Way rise in the dark southern skies, calculating the moment when Milky Way and precious flowing water would meet. In the panoramic night skyscape, stars and nebulae immersed in the glow along the Milky Way itself also shared that moment with the Milky Way's satellite galaxies the Large and Small Magellanic clouds above the horizon at the right. Bright star Beta Centauri is poised at the very top of the waterfall. Above it lies the dark expanse of the Coalsack nebula and the stars of the Southern Cross.

Tomorrow's picture: when stars explode

3. ### 海龙

3楼 1月13日 茶馆馆长

这个我喜欢！！
/asnowwolf-amuse

4. ### baishuxu

4楼 1月13日 天文版主
4周前baishuxu 重新编辑

2019 January 13

X射线波段下看到的第谷超新星遗迹
Tycho's Supernova Remnant in X-ray

Image Credit: NASA / CXC / F.J. Lu (Chinese Academy of Sciences) et al.

Explanation: What star created this huge puffball? What's pictured is the hot expanding nebula of Tycho's supernova remnant , the result of a stellar explosion first recorded over 400 years ago by the famous astronomer Tycho Brahe . The featured image is a composite of three X-ray colors taken by the orbiting Chandra X-ray Observatory . The expanding gas cloud is extremely hot, while slightly different expansion speeds have given the cloud a puffy appearance. Although the star that created SN 1572 , is likely completely gone, a star dubbed Tycho G , too dim to be discerned here , is thought to be a companion. Finding progenitor remnants of Tycho's supernova is particularly important because the supernova is of Type Ia, an important rung in the distance ladder that calibrates the scale of the visible universe. The peak brightness of Type Ia supernovas is thought to be well understood, making them quite valuable in exploring the relationship between faintness and farness in the distant universe.

Tomorrow's picture: meteor mountain

5. ### baishuxu

5楼 1月14日 天文版主
4周前baishuxu 重新编辑

2019 January 14

在阿尔卑斯山上看流星与银河
Meteor and Milky Way over the Alps

Image Credit & Copyright: Nicholas Roemmelt (Venture Photography )

Explanation: Now this was a view with a thrill. From Mount Tschirgant in the Alps , you can see not only nearby towns and distant Tyrol ean peaks, but also, weather permitting, stars, nebulas, and the band of the Milky Way Galaxy . What made the arduous climb worthwhile this night, though, was another peak -- the peak of the 2018 Perseids Meteor Shower . As hoped, dispersing clouds allowed a picturesque sky-gazing session that included many faint meteors, all while a carefully positioned camera took a series of exposures. Suddenly, a thrilling meteor -- bright and colorful -- slashed down right next the nearly vertical band of the Milky Way . As luck would have it, the camera caught it too. Therefore, a new image in the series was quickly taken with one of the sky-gazers posing on the nearby peak. Later, all of the images were digitally combined .

Tomorrow's picture: heart & soul

6. ### $\mathrm{NULL}$

6楼 1月14日
2019 January 12

疑是银河落九天 Milky Way Falls

Image Credit & Copyright : Yuri Beletsky (Carnegie Las Campanas Observatory , TWAN )

Explanation: It can be the driest place on planet Earth, but water still flows in Chile's Atacama desert, high in the mountains. After discovering this small creek with running water, the photographer returned to the site to watch the Milky Way rise in the dark southern skies, calculating the moment when Milky Way and precious flowing water would meet. In the panoramic night skyscape, stars and nebulae immersed in the glow along the Milky Way itself also shared that moment with the Milky Way's satellite galaxies the Large and Small Magellanic clouds above the horizon at the right. Bright star Beta Centauri is poised at the very top of the waterfall. Above it lies the dark expanse of the Coalsack nebula and the stars of the Southern Cross.

Tomorrow's picture: when stars explode

这个图好有感觉 /vv 是实拍吗？感觉瀑布那里有点不和谐……

7. ### baishuxu

7楼 1月15日 天文版主
4周前baishuxu 重新编辑

2019 January 15

心灵与灵魂星云
The Heart and Soul Nebulas

Image Credit & Copyright: Mario Zauner ([email protected])

Explanation: Is the heart and soul of our Galaxy located in Cassiopeia ? Possibly not, but that is where two bright emission nebulas nicknamed Heart and Soul can be found. The Heart Nebula , officially dubbed IC 1805 and visible in the featured image on the bottom right, has a shape reminiscent of a classical heart symbol . The Soul Nebula is officially designated IC 1871 and is visible on the upper left. Both nebulas shine brightly in the red light of energized hydrogen . Also shown in this three-color montage is light emitted from sulfur , shown in yellow, and oxygen , shown in blue. Several young open clusters of stars are visible near the nebula centers. Light takes about 6,000 years to reach us from these nebulas , which together span roughly 300 light years . Studies of stars and clusters like those found in the Heart and Soul Nebulas have focused on how massive stars form and how they affect their environment .

Tomorrow's picture: open space

8. ### 日始之音

8楼 1月15日 物理版主

支持一下楼主……本来我也打算搬一下顺便翻译的，然后忙起来就忘了_(:з」∠)_

9. ### baishuxu

9楼 1月15日 天文版主
4周前baishuxu 重新编辑

@日始之音 支持一下楼主……本来我也打算搬一下顺便翻译的，然后忙起来就忘了_(:з」∠)_

我也想翻译_(:з」∠)_但是可能也是有生之年了

P.S. 卧槽突然发现是元老……Orz

10. ### baishuxu

10楼 1月17日 天文版主
4周前baishuxu 重新编辑

2019 January 16

IC 342：看不见的星系
IC 342: The Hidden Galaxy

Image Credit & Copyright : Arturas Medvedevas

Explanation: Similar in size to large, bright spiral galaxies in our neighborhood, IC 342 is a mere 10 million light-years distant in the long-necked, northern constellation Camelopardalis . A sprawling island universe , IC 342 would otherwise be a prominent galaxy in our night sky, but it is hidden from clear view and only glimpsed through the veil of stars, gas and dust clouds along the plane of our own Milky Way galax y. Even though IC 342's light is dimmed and reddened by intervening cosmic clouds , this sharp telescopic image traces the galaxy's own obscuring dust, young star clusters, and glowing pink star forming regions along spiral arms that wind far from the galaxy's core . IC 342 may have undergone a recent burst of star formation activity and is close enough to have gravitationally influenced the evolution of the local group of galaxies and the Milky Way.

Tomorrow's picture: old school starry night

11. ### baishuxu

11楼 1月17日 天文版主
4周前baishuxu 重新编辑

2019 January 17

星空下的小屋
Cabin under the Stars

Image Credit & Copyright : P-M Hedén (Clear Skies , TWAN )

Explanation: Gocka's, a family nickname for the mountain cabin, and a wooden sled from a generation past stand quietly under the stars. The single exposure image was taken on January 6 from Tanndalen Sweden to evoke a simple visual experience of the dark mountain skies. A pale band of starlight along the Milky Way sweeps through the scene. At the foot of Orion the Hunter, bright star Rigel shines just above the old kicksled's handrail. Capella, alpha star of Auriga the celestial charioteer, is the brightest star at the top of the frame. In fact, the familiar stars of the winter hexagon and the Pleiades star cluster can all be found in this beautiful skyscape from a northern winter night.

Tomorrow's picture: night on a rotating planet

12. 3周前

### baishuxu

12楼 1月19日 天文版主
3周前baishuxu 重新编辑

2019 January 18

环天极星轨
Circumpolar Star Trails

Image Credit & Copyright : Gabriel Funes ([email protected])

Explanation: As Earth spins on its axis, the stars appear to rotate around an observatory in this well-composed image from the Canary Island of Tenerife. Of course, the colorful concentric arcs traced out by the stars are really centered on the planet's North Celestial Pole. Convenient for northern hemisphere astro-imagers and celestial navigators alike, bright star Polaris is near the pole and positioned in this scene to be behind the telescope dome. Made with a camera fixed to a tripod, the series of over 200 stacked digital exposures spanned about 4 hours. The observatory was not operating on that clear, dark night, but that's not surprising. The dome houses the Teide Observatory's large THEMIS Solar Telescope .

Tomorrow's picture: light-weekend

13. ### baishuxu

13楼 1月20日 天文版主
3周前baishuxu 重新编辑

2019 January 19

月落时分的月全蚀
Total Lunar Eclipse at Moonset

Image Credit & Copyright : Fred Espenak (MrEclipse.com , TWAN )

Explanation: The Moon slid through Earth's shadow on January 31, 2018 in a total lunar eclipse . In this time-lapse sequence of that eclipse from Portal, Arizona, USA, the partial eclipse starts with the Moon high in the western sky. The eclipse total phase lasted about 76 minutes, but totality ended after the dark, reddened Moon set below the horizon. The upcoming total lunar eclipse , on the night of January 20/21, will be better placed for skygazers across the Americas, though. There, all 62 minutes of the total phase, when the Moon is completely immersed in Earth's dark umbral shadow, will take place with the Moon above the horizon. Watch it if you can. The next total lunar eclipse visible from anywhere on planet Earth won't take place until May 26, 2021, and then the total eclipse will last a mere 15 minutes.

Tomorrow's picture: lunar eclipse video

14. ### baishuxu

14楼 1月22日 天文版主

2019 January 20

月全蚀视频
A Total Lunar Eclipse Video

Video Credit & Copyright: Jun Ho Oh (KAIST , HuboLab ), Kwon O Chul (TWAN ), Jeong ByoungJun (RainbowAstro)

Explanation: Tonight a bright full Moon will fade to red. Tonight's moon will be particularly bright because it is reaching its fully lit phase when it is relatively close to the Earth in its elliptical orbit . In fact, by some measures of size and brightness, tonight's full Moon is designated a supermoon , although perhaps the "super" is overstated because it will be only a few percent larger and brighter than the average full Moon. However, our Moon will fade to a dim red because it will also undergo a total lunar eclipse -- an episode when the Moon becomes completely engulfed in Earth's shadow. The faint red color results from blue sunlight being more strongly scattered away by the Earth's atmosphere. A January full moon, like the one visible tonight, is referred to as a Wolf Moon in some cultures. Tonight's supermoon total eclipse will last over an hour and be best visible from North and South America after sunset. The featured time-lapse video shows the last total lunar eclipse -- which occurred in 2018 July. The next total lunar eclipse will occur only in 2021 May.

Tomorrow's picture: selfie on mars

15. ### baishuxu

15楼 1月22日 天文版主

2019 January 21

洞见计划登陆车在火星上的自拍照
InSight Lander Takes Selfie on Mars

Image Credit: NASA /JPL-Caltech

Explanation: This is what NASA's Insight lander looks like on Mars. With its solar panels , InSight is about the size of a small bus. Insight successfully landed on Mars in November with a main objective to detect seismic activity . The featured selfie is a compilation of several images taken of different parts of the InSight lander, by the lander's arm , at different times. SEIS , the orange-domed seismometer seen near the image center last month, has now been placed on the Martian surface . With this selfie, Mars InSight continues a long tradition of robotic spacecraft on Mars taking and returning images of themselves, including Viking , Sojourner , Pathfinder , Spirit , Opportunity , Phoenix , and Curiosity . Data taken by Mars Insight is expected to give humanity unprecedented data involving the interior of Mars , a region thought to harbor formation clues not only about Mars, but Earth .

Growing Gallery: Last Night's Total Lunar Eclipse
Tomorrow's picture: good lunar eclipse photo

16. ### zhrrr

16楼 1月23日

大饱眼福系列 /asnowwolf-laugh

17. ### baishuxu

17楼 1月23日 天文版主

2019 January 22

科隆主教座堂上空的月蚀
Lunar Eclipse over Cologne Cathedral

Image Credit & Copyright: Martin Junius

Explanation: Why would a bright full Moon suddenly become dark? Because it entered the shadow of the Earth . That's what happened Sunday night as the Moon underwent a total lunar eclipse . Dubbed by some as a Super (because the Moon was angularly larger than usual, at least slightly) Blood (because the scattering of sunlight through the Earth's atmosphere makes an eclipsed Moon appeared unusually red) Wolf (because January full moons are sometimes called Wolf Moons from the legend that wolves like to howl at the moon) Moon Eclipse, the shadowy spectacle was visible from the half of the Earth then facing the Moon , and was captured in numerous spectacular photographs . Featured, a notable image sequence was captured over the Cologne Cathedral , a UNESCO World Heritage Site , in Cologne , Germany . The lunar eclipse sequence was composed from 68 different exposures captured over three hours during freezing temperatures -- and later digitally combined and edited to remove a cyclist and a pedestrian. The next total lunar eclipse will occur in 2021.

Gallery: Sunday Night's Total Lunar Eclipse
Tomorrow's picture: icy orion

18. ### baishuxu

18楼 1月24日 天文版主

2019 January 23

奥地利境内阿尔卑斯山脉上的猎户座
Orion over the Austrian Alps

Image Credit & Copyright: Lukáš Veselý

Explanation: Do you recognize this constellation? Through the icicles and past the mountains is Orion , one of the most identifiable star groupings on the sky and an icon familiar to humanity for over 30,000 years. Orion has looked pretty much the same during the past 50,000 years and should continue to look the same for many thousands of years into the future. Orion is quite prominent in the sky this time of year, a recurring sign of (modern) winter in Earth's northern hemisphere and summer in the south. Pictured, Orion was captured recently above the Austria n Alps in a composite of seven images taken by the same camera in the same location during the same night. Below and slightly to the right of Orion's three-star belt is the Orion Nebula , while the four bright stars surrounding the belt are, clockwise from the upper left, Betelgeuse , Bellatrix , Rigel , and Saiph .

New: Instagram page features cool images recently submitted to APOD
Tomorrow's picture: the cold eclipse

19. ### baishuxu

19楼 1月24日 天文版主
3周前baishuxu 重新编辑

2019 January 24

马特洪峰、月亮与流星
Matterhorn, Moon, and Meteor

Image Credit & Copyright : Stephane Vetter (Nuits sacrées ), TWAN

Explanation: Fans of planet Earth probably recognize the Matterhorn in the foreground of this night skyscape. Famed in mountaineering history , the 4,478 meter Alpine mountain stands next to the totally eclipsed Moon. In spite of -22 degree C temperatures, the inspired scene was captured on the morning of January 21 from the mountains near Zermatt, Switzerland. Different exposures record the dim red light reflected by the Moon fully immersed in Earth's shadow . Seen directly above the famous Alpine peak, but about 600 light-years away, are the stars of the Praesepe or Beehive star cluster also known as Messier 44 . An added reward to the cold eclipse vigil, a bright and colorful meteor flashed below the temporarily dimmmed Moon, just tracing the Matterhorn's north-eastern climbing route along Hornli ridge.

Tomorrow's picture: Moon Struck

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