Archivo de imágenes de Hubble
NGC 2276
The magnificent spiral galaxy NGC 2276 looks a bit lopsided in this Hubble Space Telescope snapshot. A bright hub of older yellowish stars normally lies directly in the center of most spiral galaxies. But the bulge in NGC 2276 looks offset to the upper left. In reality, a neighb...
- Fecha
- Jan 1, 2021
- Misión
- Hubble Space Telescope
- ID de archivo
- hubblesite-images-2021-029-01f60k4cf8wrad8gq03hebnbmq
The magnificent spiral galaxy NGC 2276 looks a bit lopsided in this Hubble Space Telescope snapshot. A bright hub of older yellowish stars normally lies directly in the center of most spiral galaxies. But the bulge in NGC 2276 looks offset to the upper left.
In reality, a neighboring galaxy to the right of NGC 2276 (NGC 2300, not seen here) is gravitationally tugging on its disk of blue stars, pulling the stars on one side of the galaxy outward to distort the galaxy's normal fried-egg appearance.
This sort of "tug of war" between galaxies that pass close enough to feel each other's gravitational pull is not uncommon in the universe. But, like snowflakes, no two close encounters look exactly alike.
In addition, newborn and short-lived massive stars form a bright, blue arm along the upper left edge of NGC 2276. They trace out a lane of intense star formation. This may have been triggered by a prior collision with a dwarf galaxy. It could also be due to NGC 2276 plowing into the superheated gas that lies among galaxies in galaxy clusters. This would compress the gas to precipitate into stars, and trigger a firestorm of starbirth.
The spiral galaxy lies 120 million light-years away, in the northern constellation Cepheus.
This image was taken as part of the HST observation program #15615 (PI: P. Sell), a collaboration between the University of Florida (USA), the University of Crete/FORTH (Greece), INAF-Brera (Italy), and the Center for Astrophysics | Harvard & Smithsonian (USA).
Credits
Image
NASA, ESA, STScI, Paul Sell (University of Florida)
Acknowledgment
Leo Shatz
Detalles de la imagen
| About The Object | |
|---|---|
| Object Name | NGC 2276 |
| Object Description | Interacting Spiral Galaxy |
| R.A. Position | 07:27:33.61 |
| Dec. Position | 85:45:29.95 |
| Constellation | Cepheus |
| Distance | 120 million light-years |
| Dimensions | Image is 2.5 arcmin across (about 88,000 light-years) |
| About The Data | |
| Data Description | The Hubble image was created from HST data from proposals: (P. Sell) |
| Instrument | WFC3/UVIS |
| Exposure Dates | 31 Jul - 20 Aug 2019 |
| Filters | F275W, F336W, F438W, F555W, F814W |
| About The Image | |
| Color Info | These images are a composite of separate exposures acquired by the WFC3 instrument on the Hubble Space Telescope. Several filters were used to sample narrow wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Purple: F275W Blue: F336W Cyan: F438W Green: F555W Red: F814W |
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Ver en NASA.gov