发射星云、暗星云与尘埃

发射星云、暗星云与尘埃

BySamuel Chan

2024年1月10日 The Light, the Dark, and the Dusty Image Credit & Copyright: Gábor Galambos Explanation: This colorful skyscape spans about three full moons across nebula rich starfields along the plane of our Milky Way Galaxy toward the royal northern constellation Cepheus. Near the edge of the region’s massive molecular cloud some 2,400 light-years away, bright reddish emission region Sharpless (Sh)2-155 is at the center of the frame, also known as the Cave Nebula. About 10 light-years across the cosmic cave’s bright walls of gas are ionized by ultraviolet light from the hot young stars around it. Dusty bluish reflection nebulae, like vdB 155 at the left, and dense obscuring clouds of dust also abound on the interstellar canvas. Astronomical explorations have revealed other dramatic signs…

宇宙的倒影

宇宙的倒影

ByNASA中文

2023年9月22日 Cosmos in Reflection Image Credit & Copyright: Jeff Dai (TWAN) Explanation: During the day, over 12,000 large mirrors reflect sunlight at the 100-megawatt, molten-salt, solar thermal power plant at the western edge of the Gobi desert near Dunhuang, Gansu Province, China. Individual mirror panels turn to track the sun like sunflowers. They conspire to act as a single super mirror reflecting the sunlight toward a fixed position, the power station’s central tower. During the night the mirrors stand motionless though. They reflect the light of the countless distant stars, clusters and nebulae of the Milky Way and beyond. This sci-fi night skyscape was created with a camera fixed to a tripod near the edge of the giant mirror matrix on September 15. The camera’s…

发射星云、暗星云与尘埃

发射星云、暗星云与尘埃

ByNASA中文

2022年11月30日 The Light, the Dark, and the Dusty Image Credit & Copyright: Anthony Quintile Explanation: This colorful skyscape spans about four full moons across nebula rich starfields along the plane of our Milky Way Galaxy in the royal northern constellation Cepheus. Near the edge of the region’s massive molecular cloud some 2,400 light-years away, bright reddish emission region Sharpless (Sh) 155 is at the center of the frame, also known as the Cave Nebula. About 10 light-years across the cosmic cave’s bright walls of gas are ionized by ultraviolet light from the hot young stars around it. Dusty reflection nebulae, like vdB 155 to the right, and dense obscuring clouds of dust also abound on the interstellar canvas. Astronomical explorations have revealed other dramatic signs…

狼窟星云

狼窟星云

ByNASA中文

2022年11月15日 Wolf’s Cave Nebula Image Credit & Copyright: Gianni Lacroce Explanation: The mysterious blue reflection nebula found in catalogs as VdB 152 or Ced 201 really is very faint. It lies at the tip of the long dark nebula Barnard 175 in a dusty complex that has also been called Wolf’s Cave. At the center of this deep telescopic view, the cosmic apparitions are nearly 1,400 light-years away along the northern Milky Way in the royal constellation Cepheus. Interstellar dust in the region blocks light from background stars and scatters light from the embedded bright star, giving the end nebula its characteristic blue color. Though stars do form in molecular clouds, this star seems to have only accidentally wandered into the area, as its measured…

复合星云NGC 6914

复合星云NGC 6914

ByNASA中文

2022年7月7日 The NGC 6914 Complex Image Credit & Copyright: Giorgio Ferrari Explanation: A study in contrasts, this colorful skyscape features stars, dust, and glowing gas in the vicinity of NGC 6914. The interstellar complex of nebulae lies some 6,000 light-years away, toward the high-flying northern constellation Cygnus and the plane of our Milky Way Galaxy. Obscuring interstellar dust clouds appear in silhouette while reddish hydrogen emission nebulae, along with the dusty blue reflection nebulae, fill the cosmic canvas. Ultraviolet radiation from the massive, hot, young stars of the extensive Cygnus OB2 association ionize the region’s atomic hydrogen gas, producing the characteristic red glow as protons and electrons recombine. Embedded Cygnus OB2 stars also provide the blue starlight strongly reflected by the dust clouds. The over…

夜空的倒影

夜空的倒影

ByNASA中文

2021年9月13日 Night Sky Reflected Image Credit & Copyright: Egon Filter Explanation: What’s that in the mirror? In the featured image of the dark southern sky, the three brightest galaxies of the night are all relatively easy to identify. Starting from the left, these are the Small Magellanic Cloud (SMC), the Large Magellanic Cloud (LMC), and part of the central band of our Milky Way Galaxy. All three are also seen reflected in a shallow pool of water. But what is seen in the mirror being positioned by the playful astrophotographer? Dust clouds near the center of our Milky Way — and the planet Jupiter. The composite was carefully planned and composed from images captured from the same camera in the same location and during the…

花月东升

花月东升

ByNASA中文

2020 May 9 Full Flower Moonrise Image Credit & Copyright: Tiziano Boldrini Explanation: Rising as the Sun set, the Moon was bright and full in planet Earth skies on May 7 and known to some as a Flower Moon. Near the horizon it does seem to take on rose pink hues of reddened sunlight in this reflective twilight scene. In fact one of the brighter Full Moons of the year, this month’s full lunar phase occurred within about 32 hours of perigee. That’s the closest point in the Moon’s elliptical orbit. Flooded field and ruined church tower are near the municipality of Casaleggio Novara, Piedmont Region of northern Italy. Tomorrow’s picture: peculiar galaxies 花月东升 影像提供与版权: Tiziano Boldrini 说明: 5月7日在日落时东升的这轮明亮满月，有花月的令名。而在这幅带着倒影的暮光时分影像里，悬在地平面附近的这轮明亮，还真的有粉红的色泽。它是今年最明亮的满月之一，因为在绕行地球的椭圆轨道上，这轮明月满相时，位置离近地点约32小时。影像里的浸水问野和残存的教堂钟塔，座落在北义大利．皮埃蒙特大区的卡萨莱焦诺瓦拉村附近。 明日的图片: peculiar galaxies

光、影与尘埃

光、影与尘埃

ByNASA中文

2020 March 5 The Light, the Dark, and the Dusty Image Credit & Copyright: Casey Good Explanation: This colorful skyscape spans about four full moons across nebula rich starfields along the plane of our Milky Way Galaxy in the royal northern constellation Cepheus. Near the edge of the region’s massive molecular cloud some 2,400 light-years away, bright reddish emission region Sharpless (Sh) 155 is left of center, also known as the Cave Nebula. About 10 light-years across the cosmic cave’s bright walls of gas are ionized by ultraviolet light from the hot young stars around it. Dusty blue reflection nebulae, like vdB 155 at lower right, and dense obscuring clouds of dust also abound on the interstellar canvas. Astronomical explorations have revealed other dramatic signs…