您现在的位置是:綜合 >>正文
【】
綜合84人已围观
简介Fitting that this juicy piece of eye candy from the Hubble Space Telescope captured a starburst, a b ...
Fitting that this juicy piece of eye candy from the Hubble Space Telescope captured a starburst, a brief and intense star-forming period for a galaxy.
Say hello to NGC 1705, a dwarf galaxy about 17 million light-years from Earth in the southern constellation Pictor, the "painter's easel." NGC has produced many young stars outside the galaxy's core, as well as the central giant star cluster.
It is petite, oddly shaped, and has recently spawned a bounty of stars. NASA and the European Space Agency released the snapshot last week.
This galaxy has been churning out new stars its entire life, but it kicked into high gear as recently as 26 to 31 million years ago. That's not long relative to the estimated age of the universe, nearing 14 billion years. During starbursts, the stellar birth rate can be tens to hundreds of times greater than in typical spiral galaxies.
SEE ALSO:Want to see a brilliant star nursery and vivid planets? Look up in February.Astronomers like to study dwarf irregular galaxies because they can give valuable insight into the early history of the universe: They tend to have little more than hydrogen or helium in the way of elements and are thought to be similar to the oldest galaxies ever formed.
The new Hubble Space Telescope image of dwarf galaxy NGC 1705, top, provides more depth and detail of the starburst than the observatory's previous camera, used to take the 1999 photo, bottom. Credit: Top: ESA/Hubble & NASA, R. Chandar; bottom: NASA, ESA, and The Hubble Heritage Team (STScI/AURA);SEE ALSO:Is the mysterious 'space diamond' for real? An investigation.Scientists last photographed this galaxy in 1999 using Hubble’s former camera, the Wide Field Planetary Camera 2. Astronauts replaced it with the Wide Field Camera 3 in 2009. The newer camera was used to take the latest picture, revealing a lot more detail.
Starburst galaxies are considered to be among the most luminous infrared objects in the universe. Astronomers wanted to revisit NGC 1705 to study a specific wavelength of light, wherein they'd find thousands of nebulae, aka star nurseries. The star-making regions are created when hot, young stars bathe their surrounding gas clouds in ultraviolet light, causing them to glow.
TopicsInnovations
Tags:
转载:欢迎各位朋友分享到网络,但转载请说明文章出处“夫榮妻貴網”。http://www.new.maomao321.com/news/3c59099406.html
相关文章
Olympic security asks female Iranian fan to drop protest sign
綜合Olympic security personnel questioned a female Iranian volleyball fan Saturday when she showed up fo ...
【綜合】
阅读更多Obama names 2 new national monuments before Trump takes office
綜合Add two more national monuments to President Barack Obama's conservation legacy.On Tuesday afternoon ...
【綜合】
阅读更多Julian Assange says once again that Russia is not Wikileaks' source
綜合Wikileaks founder Julian Assange is claiming again that a Russian-connected source didn't leak hacke ...
【綜合】
阅读更多
热门文章
- Airbnb activates disaster response site for Louisiana flooding
- Cher will star in Lifetime's movie about the Flint water crisis
- Dazzling photo of stellar nursery cuts through cosmic dust to reveal baby stars
- Steve Harvey can't fathom how anyone could want to date an Asian man
- Two states took big steps this week to get rid of the tampon tax
- Here's when Intel's standalone wireless VR headset will arrive
最新文章
Olympics official on Rio's green diving pool: 'Chemistry is not an exact science'
Julian Assange says once again that Russia is not Wikileaks' source
Indian soldier rants about bad food, being forced to sleep on an empty stomach, video goes viral
There's more to this photo of a horse boarding a London bus than meets the eye
Two states took big steps this week to get rid of the tampon tax
Sikh NYPD officers finally allowed to wear turbans in 'major change' to uniform policy