"Macacos me mordam ; quem estaa espiando ?!"
2018-03-26
Astronomy picture of the day - 2018 March 26 - The Coma Cluster of Galaxies
Image Credit: Russ Carroll, Robert Gendler, & Bob Frank; Dan Zowada Memorial Observatory
Explanation: Almost every object in the above photograph is a galaxy. The Coma Cluster of Galaxies pictured here is one of the densest clusters known - it contains thousands of galaxies. Each of these galaxies houses billions of stars - just as our own Milky Way Galaxy does. Although nearby when compared to most other clusters, light from the Coma Cluster still takes hundreds of millions of years to reach us. In fact, the Coma Cluster is so big it takes light millions of years just to go from one side to the other. Most galaxies in Coma and other clusters are ellipticals, while most galaxies outside of clusters are spirals. The nature of Coma's X-ray emission is still being investigated.
2018-03-25
Brassaï - A noite parisiense - Fotografia
Um dos fotógrafos mais célebres de seu tempo, Brassaï registrou Paris de forma irreverente. A noite parisiense exerceu um enorme fascínio sobre ele, que não cansou de fotografá-la.
Astronomy picture of the day - 2018 March 25 - Announcing Nova Carinae 2018
Image Credit & Copyright: A. Maury & J. Fabrega
Explanation: How bright will Nova Carinae 2018 become? The new nova was discovered only last week. Although novas occur frequently throughout the universe, this nova, cataloged as ASASSN-18fv, is so unusually bright in theskies of Earth that it is now easily visible through binoculars in the southern hemisphere. Identified by the arrow, the nova occurs near the direction of the picturesque Carina Nebula. A nova is typically caused by a thermonuclear explosion on the surface of a white dwarf star that is accreting matter from a binary companion, although details of this outburst are currently unknown. Both professional and amateur astronomers will be monitoring this unusual stellar outburst in the coming weeks, looking to see how Nova Carinae 2018 evolves, including whether it becomes bright enough to be visible to the unaided eye.
2018-03-24
JoanMira - "Recordando amigos do Rio de Janeiro" - Fotos
"Recordando amigos do Rio de Janeiro"
24-03-2018
JoanMira
Astronomy picture of the day - 2018 March 24 - NGC 602 and Beyond
NGC 602 and Beyond
Image Credit: X-ray: Chandra: NASA/CXC/Univ.Potsdam/L.Oskinova et al;
Optical: Hubble: NASA/STScI; Infrared: Spitzer: NASA/JPL-Caltech
Explanation: Near the outskirts of the Small Magellanic Cloud, a satellite galaxy some 200 thousand light-years distant, lies 5 million year young star cluster NGC 602. Surrounded by natal gas and dust, NGC 602 is featured in thisstunning Hubble image of the region, augmented by images in the X-ray by Chandra, and in the infrared by Spitzer. Fantastic ridges and swept back shapes strongly suggest that energetic radiation and shock waves from NGC 602's massive young stars have eroded the dusty material and triggered a progression of star formation moving away from the cluster's center. At the estimated distance of the Small Magellanic Cloud, the Picture spans about 200 light-years, but a tantalizing assortment of background galaxies are also visible in this sharp multi-colored view. The background galaxies are hundreds of millions of light-years or more beyond NGC 602.
Inscription à :
Commentaires (Atom)