Latest Stellar astronomy Stories

Astronomers Detect Relatively Cool Supernova Remnant
2013-07-05 14:00:28

Lee Rannals for redOrbit.com - Your Universe Online An international team of astronomers detected surprisingly low temperatures in the remnant of the supernova 1987A, helping to explain the mystery of why space is filled with dust grains and molecules. The team used the Herschel Space Observatory and Atacama Millimeter and Submillimeter Array (ALMA) to study the supernova remnant. They were able to find a vast reservoir of unexpectedly cold molecules and dust. "The powerful explosion...

Stellar Collision Survivor New Type Pulsating Star
2013-06-28 14:54:18

Lee Rannals for redOrbit.com - Your Universe Online Astronomers have discovered that the brightness of the remnant of a stellar collision can vary in a way that scientists have not observed before. The team wrote in the journal Nature that these observations will allow astronomers to learn what happens when stars collide in binary systems. Stars like our Sun expand to become red giant stars when the hydrogen that fuels the nuclear fusion in their cores runs out. Binary stars will...

Suck It Up! Sun Provides Insight Into How Young Stars Grow
2013-06-21 04:26:50

April Flowers for redOrbit.com - Your Universe Online Our Sun erupted on June 7, 2011, sending tons of hot plasma blasting into space. Some of the plasma fell back to the surface of the Sun, sparking bright flashes of ultraviolet light. A new study from the Harvard-Smithsonian Center for Astrophysics (CfA) examines the dramatic event to provide new insights into how young stars grow by consuming nearby gas. NASA's Solar Dynamics Observatory captured the eruption and subsequent...

Pulsating White Dwarf Discovered By UT Astronomers
2013-06-20 12:47:40

Lee Rannals for redOrbit.com - Your Universe Online A group of astronomers have discovered pulsations from the crystallized remnant of a burnt-out star. The researchers recently reported in The Astrophysical Journal Letters that they were able to use the 2.1-meter Otto Struve Telescope at the University of Texas McDonald Observatory to take a look at the white dwarf GD 518 and discover the pulsations. This finding will allow scientists to see below the star's atmosphere and into its...

Nearby Flare Star Gives Burst Of Light
2013-06-14 12:17:36

Brett Smith for redOrbit.com - Your Universe Online Within a span of three minutes, a star in the Usra Major constellation less than 16 light-years from Earth gave off a massive flare, making the object 15 times brighter than normal, according to a new report in the journal Astrophysics. The star, known as WX“¯UMa, is a so-called flare star, a class of stars which can become 100 times or more brighter within a few seconds or minutes. These flares appear to be randomly...

More Galactic Gas In Milky Way Than We Thought
2013-06-11 14:31:02

Brett Smith for redOrbit.com - Your Universe Online The building blocks of stars, clouds of molecular gases, are strewn across the Milky Way, and a new survey from the European Space Agency (ESA) and NASA has found that scientists have been underestimating the amount of gas in the galaxy by about one-third. According to a new report in journal Astronomy and Astrophysics, the discovery was made possible by the orbiting Hershel Space Observatory, a joint venture between the two space...

NGC 6334: Shedding Light On Starburst Regions
2013-06-05 13:00:40

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online Stars are formed in massive clouds of gas that are being compressed by some nearby event. Over time, the region will be consumed by the forming stars, leaving a cluster that will eventually drift apart. But what starts this process in the first place? Often these regions of star formations -- known as starburst regions -- are found in distant galaxies where the activity level is very high. But this presents a problem:...

Predicting The End Of Stars Relies On How Much Sodium They Have
2013-05-29 12:58:12

[WATCH VIDEOS: A Close Look At NGC 6752 | Zooming In On NGC 6752] Lee Rannals for redOrbit.com — Your Universe Online An international team of astronomers published a paper today in the journal Nature detailing the role sodium plays in determining how stars evolve and how they end their lives. Astronomers believe that stars like the Sun will blow off much of their atmospheres into space near the ends of their lives, which is known as asymptotic giant branch (AGB). However, new...

Jets Powered By A Black Hole Plow Into Galaxy
2013-05-16 07:56:30

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online Astronomy is more than merely using optical telescopes to take pretty pictures of distant nebulae and galaxies. Researchers also seek to understand complex systems in the universe by observing how objects interact and what types of radiation are produced. To do this requires telescopes capable of observing over several energy bands, working together to construct a complete physical picture of the object of interest....

Orion Reveals A Hidden Fiery Ribbon
2013-05-15 05:10:13

[ Video 1 ] | [ Video 2 ] Lee Rannals for redOrbit.com - Your Universe Online The European Southern Observatory (ESO) has released a new image of the constellation of Orion showing part of the Orion Molecular Cloud. The image shows off clouds of gas and interstellar dust at wavelengths too long for the human eye to see. These tiny dust grains block the view of what lies within and behind the clouds, making it difficult to observe star formation taking place in this region. In...

Latest Stellar astronomy Reference Libraries

Stellar Astrophysics
2014-01-12 00:00:00

The prominent feature that allows for the existence of life on Earth is the Sun. Radiation from our closest star provides heat and energy to our planet, driving biological processes and providing the necessary conditions for liquid water to naturally exist. But our Sun is only but one star in this vast Universe. And as it turns out, most stars are quite different than the one that illuminates our day. For this reason, scientists have, for hundreds of years, attempted to study the other...

2004-10-19 04:45:43

Hertzsprung-Russell Diagram -- In stellar astronomy, the Hertzsprung-Russell diagram (H-R diagram) shows the relation between the absolute magnitude and the spectral types of stars. It was invented around 1910 by Ejnar Hertzsprung and Henry Norris Russell. There are two equivalent forms. One is the observer's form which plots the color of the star on one axis and the absolute magnitude on the other axis. The theoretician's form plots the temperature of the star on one axis and the...

2004-10-19 04:45:42

Stellar Evolution -- Stellar evolution is the process of formation, life, and death of stars. It is one of the major topics of cosmogony. Star Birth and Life A star starts out as an enormous cloud of gas and dust many light-years across. Star formation begins when the cloud begins to condense under its own gravity. The processes that initiate this contraction are not fully understood. The cloud fragments fuse into stellar mass clouds known as protostars. Protostars do not emit...

2004-10-19 04:45:42

Star Formation -- Star formation is the process by which gas in molecular clouds gets transformed into stars. In the current paradigm of star formation, cores of molecular clouds (regions of specially high density) became gravitationally unstable, and start to concentrate. Part of the gravitational energy lost in the process is radiated in the infrared, another part increases the temperature of the core. The accretion of material happen partially though a circumstellar disc. When...

2004-10-19 04:45:42

Star Designation -- The International Astronomical Union (IAU) is the internationally recognised authority for assigning designations to stars (and other celestial bodies). Many of the star names in use today were inherited from the time before the IAU existed. Other names, mainly for variable stars (including novae and supernovae), are being added all the time. Most stars, however, have no name and are referred to, if at all, by means of catalogue numbers. This article briefly...

More Articles (12 articles) »
Word of the Day
  • Boughs or branches.
  • Warbling of birds in trees.