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Last updated on April 16, 2014 at 12:11 EDT
Celestial Diamond Ring Created By Chance Meeting

Celestial Diamond Ring Created By Chance Meeting

[ Watch The Video: Zooming In On The Planetary Nebula Abell 33 ] ESO Astronomers using ESO’s Very Large Telescope in Chile have captured this eye-catching image of planetary nebula PN A66 33 — usually known as Abell 33. Created when...

Latest Stellar evolution Stories

Reconstructing The Death Of Supernovae In 3D Offers New Insights
2014-03-18 13:29:42

Lee Rannals for redOrbit.com - Your Universe Online An astrophysicist has created a new three-dimensional model that provides new insight into the death throes of supernovae. The model, created by W. David Arnett, Regents Professor of Astrophysics at the University of Arizona, is the first to represent the start of a supernova collapse in 3D. It shows how the turbulent mixing of elements inside the dying stars causes them to expand, contract and spit out matter before exploding....

A Wide Range Of Masses Observed In Type Ia Supernovae
2014-03-04 13:06:14

Lee Rannals for redOrbit.com - Your Universe Online Astronomers, publishing a paper in the Monthly Notices of the Royal Astronomical Society, show how Type Ia supernovae have a range of masses. Scientists have been confident in knowing why Type Ia supernovae are all so much alike. Most of them assumed that carbon-oxygen white dwarf stars capture additional mass by stripping it from a companion star or by merging with another white dwarf. Scientists assumed this class of supernova were...

radioactivity in a supernova remnant
2014-02-20 05:54:04

[ Watch the Video: Sloshing Star Goes Supernova ] April Flowers for redOrbit.com - Your Universe Online For the first time, astronomers have peered into the heart of an exploding star during the final minutes of its life. This groundbreaking achievement is one of the primary goals of NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) mission, which launched in June 2012. NuSTAR is tasked to measure high energy X-ray emissions from exploding stars, also known as supernovae, and...

Computer Simulations Reveal The Destruction Of A Star As It Falls Into A Black Hole
2014-02-19 05:24:10

April Flowers for redOrbit.com - Your Universe Online Exploring the universe's most violent events using computer simulations is what Enrico Ramirez-Ruiz does. So in 2012, when the first detailed observations of a star being ripped apart by a black hole were reported in Nature, Ramirez-Ruiz was eager to compare the data to his simulations. This was especially true because he doubted one of the published conclusions: that the disrupted star was a rare helium star. "I was sure it was a...

Bipolar Jets Of Gas, Dust Created By Small Planetary Nebulae
2014-02-13 08:01:47

April Flowers for redOrbit.com - Your Universe Online Large stars can end their lives as violently cataclysmic supernovae. Small stars, in contrast, end up as planetary nebulae—colorful, glowing clouds of dust and gas. These nebulae were once thought to be mostly spherical. In the last few decades, however, they have been observed to often emit powerful, bipolar jets of gas and dust. Scientists are unsure how spherical stars evolve to produce highly aspherical planetary nebulae, however....

Using Simulations To Chart The Forces Of The Early Universe
2014-02-06 10:13:28

Brett Smith for redOrbit.com - Your Universe Online Most scientific calculations need a reference point to be completed, but what if the calculations are for the beginning of the Universe – where points of reference are somewhat ephemeral? In a new study, published in the Monthly Notices of the Royal Astronomical Society, researchers from The University of Texas at Austin tried to do just that – conduct numerical simulations aimed at charting the forces of the Universe in its first...

2014-01-30 20:20:09

OAKLAND, Calif., Jan. 30, 2014 /PRNewswire-USNewswire/ -- Chabot Astronomers are tracking the latest supernova about 12 million light years away. Identified as "2014J," a Type 1A supernova, the phenomenon is occurring in Messier-82 (M82), also known as the Cigar Galaxy. Supernovae occur when a star explodes emitting a massive amount of energy in a short span of time; the star literally collapses under its own gravity. 2014J actually exploded about 12 million...

supernova
2014-01-26 05:13:55

[ Watch the Video: What Interstellar Blast Is Lighting Up The Sky? ] redOrbit Staff & Wire Reports - Your Universe Online Several NASA spacecraft and Earth-based observatories, including the Hubble Space Telescope and the Chandra X-ray Observatory, are studying an incredibly close supernova that took place on January 21, officials from the US space agency announced on Friday. The stellar explosion, which has been designated SN 2014J, lies approximately 12 million light-years away...

Our Understanding of the Universe MAXI-mized By The International Space Station
2014-01-16 08:31:10

NASA Look up at the night sky … do you see it? The stars of the cosmos bursting in magnificent explosions of death and rebirth! No? Well, then maybe you are not looking through the “eyes” of the Monitor of All-sky X-ray Image (MAXI) investigation, mounted on the exterior of the International Space Station Kibo module. MAXI, along with other sky watching instruments, such as Swift, collect data that help researchers discover, study and understand the physics behind the powerful...

Rare Binary White Dwarf Systems
2013-12-20 08:30:50

John P. Millis, PhD for redOrbit.com - Your Universe Online Nearly a half-century ago, astronomers discovered a strange star in the Canes Venatici constellation. It was later determined that the unusual properties of the object arose because it was not an isolated star at all, but rather a very tight binary system. With an orbital period of 18 minutes – for comparison the orbit of Mercury around the Sun takes about 88 Earth days – the individual members of the system are incredibly...


Latest Stellar evolution 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...

7_4b235c0bfbfc8504a41844f9c48ad8962
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...

6_c21be0ecb1b565a9be109a383c38223f2
2004-10-19 04:45:43

White Dwarf -- A white dwarf is a a star supported by electron degeneracy. A star like our Sun will become a white dwarf when it has exhausted its nuclear fuel. Near the end of its nuclear burning stage, such a star goes through a red giant phase and then expels most of its outer material (creating a planetary nebula) until only the hot (T > 100,000 K) core remains, which then settles down to become a young white dwarf. A typical white dwarf is half as massive as the Sun, yet only...

6_19859ff34fd03d00777232e2520ce83f5
2004-10-19 04:45:42

Supernova Remnant -- A supernova remnant (SNR) is made up of the materials left behind by the gigantic explosion of a star in a supernova. There are two possible routes to this end: either a massive star may cease to generate fusion energy in its core, and collapse inward under the force of its own gravity, or a white dwarf star may accumulate material from a companion star until it reaches a critical mass and undergoes a similar collapse. In either case, the resulting supernova...

6_79c799b9f03f60809a9d0aecf38491202
2004-10-19 04:45:42

Supernova -- A supernova is a star that increases its brightness drastically within a matter of days, making it appear as if a "new" star was born (hence "nova"). The "super" prefix distinguishes it from a mere nova, which also involves a star increasing in brightness, though to a lesser extent and through a much different mechanism. Astronomers have classified supernovae in several classes, according to the lines of different elements that appear in their spectra. The first...

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