File:Potw1339a.tif
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Summary
DescriptionPotw1339a.tif |
English: A pulsating stellar relic
At the centre of this blue cloud lies what remains of the nebula's progenitor star. This cool, dim, and extremely dense star is actually a pulsating white dwarf, meaning that its brightness varies over time as gravity causes waves that pulse throughout the small star's body. NGC 2452 was discovered by Sir John Herschel in 1847. He initially defined it as "an object whose nature I cannot make out. It is certainly not a star, nor a close double star [...] I should call it an oblong planetary nebula". To early observers like Herschel with their smaller telescopes, planetary nebulae resembled gaseous planets, and so were named accordingly. The name has stuck, although modern telescopes like Hubble have made it clear that these objects are not planets at all, but the outer layers of dying stars being thrown off into space. A version of this image was entered into the Hubble's Hidden Treasures image processing competition by contestants Luca Limatola and Budeanu Cosmin Mirel. Credit: ESA/Hubble & NASA Acknowledgements: Luca Limatola, Budeanu Cosmin Mirel Hubble’s Hidden Treasures About the Object Name: NGC 2452 Type: • Milky Way : Star : Evolutionary Stage : White Dwarf • Milky Way : Star : Type : Variable : Pulsating • Milky Way : Nebula : Type : Planetary • X - Hubble Images Videos • X - Stars Images/Videos • X - Nebulae Images/Videos Colours & filters Band Wavelength Telescope Infrared I 814 nm Hubble Space Telescope WFPC2 Optical V 555 nm Hubble Space Telescope WFPC2. |
Date | Release date: 30 September 2013 |
Source | http://www.spacetelescope.org/images/potw1339a/ http://www.spacetelescope.org/static/archives/images/original/potw1339a.tif |
Author |
Credit: ESA/Hubble & NASA Acknowledgements: Luca Limatola, Budeanu Cosmin Mirel |
Permission (Reusing this file) |
http://www.spacetelescope.org/copyright/ |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:29, 1 October 2013 | 668 × 681 (929 KB) | Fabian RRRR | == {{int:filedesc}} == {{Information |Description ={{en|1='''A pulsating stellar relic A pulsating stellar relic Click to Enlarge This NASA/ESA Hubble Space Telescope image shows the planetary nebula NGC 2452, located in the southern constellation ... |
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Image title | This NASA/ESA Hubble Space Telescope image shows the planetary nebula NGC 2452, located in the southern constellation of Puppis. The blue haze across the frame is what remains of a star like our Sun after it has depleted all its fuel. When this happens, the core of the star becomes unstable and releases huge numbers of incredibly energetic particles that blow the star's atmosphere away into space. At the centre of this blue cloud lies what remains of the nebula's progenitor star. This cool, dim, and extremely dense star is actually a pulsating white dwarf, meaning that its brightness varies over time as gravity causes waves that pulse throughout the small star's body. NGC 2452 was discovered by Sir John Herschel in 1847. He initially defined it as "an object whose nature I cannot make out. It is certainly not a star, nor a close double star [...] I should call it an oblong planetary nebula". To early observers like Herschel with their smaller telescopes, planetary nebulae resembled gaseous planets, and so were named accordingly. The name has stuck, although modern telescopes like Hubble have made it clear that these objects are not planets at all, but the outer layers of dying stars being thrown off into space. A version of this image was entered into the Hubble's Hidden Treasures image processing competition by contestants Luca Limatola and Budeanu Cosmin Mirel. |
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Width | 668 px |
Height | 681 px |
Bits per component |
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Compression scheme | LZW |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Number of rows per strip | 130 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS6 (Windows) |
File change date and time | 18:43, 19 June 2013 |
Color space | Uncalibrated |
warning | wrong data type 7 for "Photoshop"; tag ignored. |