Astronomía, Astronomy.

Spiral galaxy NGC 4911 in the Coma Cluster

A long-exposure Hubble Space Telescope image shows a majestic face-on spiral galaxy located deep within the Coma Cluster of galaxies, which lies 320 million light-years away in the northern constellation Coma Berenices.

The galaxy, known as NGC 4911, contains rich lanes of dust and gas near its centre. These are silhouetted against glowing newborn star clusters and iridescent pink clouds of hydrogen, the existence of which indicates ongoing star formation. Hubble has also captured the outer spiral arms of NGC 4911, along with thousands of other galaxies of varying sizes. The high resolution of Hubble’s cameras, paired with considerably long exposures, made it possible to observe these faint details.

NGC 4911 and other spirals near the centre of the cluster are being transformed by the gravitational tug of their neighbours. In the case of NGC 4911, wispy arcs of the galaxy’s outer spiral arms are being pulled and distorted by forces from a companion galaxy (NGC 4911A), to the upper right. The resultant stripped material will eventually be dispersed throughout the core of the Coma Cluster, where it will fuel the intergalactic populations of stars and star clusters.

Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA). Acknowledgment: K. Cook (Lawrence Livermore National Laboratory, USA)

Spiral Galaxy ESO 137-001 in Galaxy Cluster Abell 3627

Image of the sun of July 6. Within spots get to see some of its inner structure. - César Cantú

A Galaxy With A Glowing Heart

  This view, captured by the NASA/ESA Hubble Space Telescope, shows a nearby spiral galaxy known as NGC 1433.
  At about 32 million light-years from Earth, it is a type of very active galaxy known as a Seyfert galaxy — a classification that accounts for 10% of all galaxies. They have very bright, luminous centres comparable to that of our galaxy, the Milky Way.
  Galaxy cores are of great interest to astronomers. The centres of most, if not all, galaxies are thought to contain a supermassive black hole, surrounded by a disc of infalling material.

Happy National Donut Day you spacenuts!
Approximately 1,000 light years from Earth lies the Fine Ring planetary nebula. Planetary nebulae form when some dying stars, having expanded into a red giant phase, expel a shell of gas as they evolve into white dwarfs. Most planetary nebulae are either spherical or elliptical in shape, or bipolar but the Fine Ring looks like an almost perfect circular ring making it very unique.Astronomers believe this particular shape as a result of the star being part of a binary system. The interaction between the primary star and its orbiting companion shapes the ejected material. Observations suggest that the binary pair is almost perfectly face-on from our vantage point, implying that the planetary nebula’s structure is aligned in the same way.
(Image credit: ESO)

The Cat’s Paw Nebula

Ancient White Dwarfs in the Milky Way
A white dwarf, also called a degenerate dwarf, is a stellar remnant composed mostly of electron-degenerate matter. They are very dense; a white dwarf’s mass is comparable to that of the Sun, and its volume is comparable to that of the Earth. Its faint luminosity comes from the emission of stored thermal energy. White dwarfs are thought to be the final evolutionary state of all stars whose mass is not high enough to become a neutron star. Over 97% of the stars in the Milky Way will eventually become white dwarfs.
Credit: NASA/Hubble

M27 Dumbbell Nebula by jpstanley on Flickr.

IC 59 and IC 63 Credit: Emil Ivanov
IC 59 and IC 63 are two comet shaped nebulae near the bright star Gamma Cassiopeiae (γ Cas, γ Cassiopeiae), which is the energy source of their illumination. Being closer to the star, IC 63 shows more brightening of its front edge and stronger H-II emission. IC 59 is situated further away fron the star and has lower level of HII emission which makes its reflection component to appear more prominent.


The Sun, as of June 1, 2014.

You’re still humoring your horoscope? That’s cute.