Profile cover photo
Profile photo
Bmp Tech
5 followers
5 followers
About
Bmp's interests
View all
Bmp's posts

Post has attachment

Post has attachment
Wish you All Happy Independent Days 
Photo
Photo
15/08/2016
2 Photos - View album

Post has shared content

Post has shared content
A bit of sunset light on the Tatoosh Range in Mount Rainier National Park. Photographed from Mazama Ridge.

http://photoblog.mrussellphotography.com/wildflowers-mazama-ridge/

#mountains #nationalparks #washington #sunset
Photo

Post has shared content

Post has shared content
Star Streams and the Whale Galaxy

NGC 4631 is a spiral galaxy found only 25 million light-years away, toward the well-trained northern constellation Canes Venatici.
Seen egde-on, the galaxy is similar in size to the Milky Way. Its distorted wedge shape suggests to some a cosmic herring and to others its popular moniker, The Whale Galaxy.

NGC 4631 has a nearby companion dwarf elliptical galaxy, NGC 4627. NGC 4627 and NGC 4631 together were listed in the Atlas of Peculiar Galaxies as an example of a "double galaxy" or a galaxy pair.

NGC 4627 lies just above the dusty yellowish core of the large galaxy companion, but also identifiable are recently discovered, faint dwarf galaxies within the halo of NGC 4631.
In fact, the faint extended features below (and above) NGC 4631 are now recognized as tidal star streams.
The star streams are remnants of a dwarf satellite galaxy disrupted by repeated encounters with the Whale that began about 3.5 billion years ago.
Even in nearby galaxies, the presence of tidal star streams is predicted by cosmological models of galaxy formation, including the formation of our own Milky Way.

NGC 4631 contains a central starburst, which is a region of intense star formation. The strong star formation is evident in the emission from ionized hydrogen and interstellar dust heated by the stars formed in the starburst.The most massive stars that form in star formation regions only burn hydrogen gas through fusion for a short period of time, after which they explode as supernovae. So many supernovae have exploded in the center of NGC 4631 that they are blowing gas out of the plane of the galaxy. This superwind can be seen in X-rays and in spectral line emission. The gas from this superwind has produced a giant, diffuse corona of hot, X-ray emitting gas around the whole galaxy.

► The image comes from APoD>>
http://apod.nasa.gov/apod/ap151219.html

Further reading and references

https://en.wikipedia.org/wiki/NGC_4631

http://messier.seds.org/xtra/ngc/n4631.html

http://www.cosmotography.com/images/small_new_ngc4631.html

http://www.cosmotography.com/images/galaxy_formation_and_evolution.html

http://apod.nasa.gov/apod/ap100125.html

#StarStreams, #TheWhaleGalaxy , #superwind , #NGC4631 , #dwarfellipticalgalaxy, #NGC4627 , #MilkyWayGalaxy , #constellationCanes_Venatici , #dwarfsatellitegalaxy
Photo

Post has shared content
Wait while more posts are being loaded