Latest Cosmic distance ladder Stories

Hubble Helps Astronomers Map Ejected Supernova Material In 3D
2013-06-04 12:22:13

Lee Rannals for redOrbit.com — Your Universe Online Astronomers using NASA's Hubble Space Telescope have mapped out a 3D structure of material ejected from an exploding star. The team used the space observatory to look at the light emitted by the close double-star system T-Pyxidis, which is a recurring nova. A nova erupts when a white dwarf has siphoned off enough hydrogen from a companion star to trigger a thermonuclear runaway. As the gas builds up on the surface of the star,...

Earth's Neighborhood In The Milky Way Sits On Spiral Arm, Not Spur
2013-06-03 14:49:23

Lee Rannals for redOrbit.com — Your Universe Online New research using the ultra-sharp radio vision of the National Science Foundation's (NSF) Very Long Baseline Array (VLBA) has determined that we live in a more upscale neighborhood in our galaxy than previously thought. Considering we reside inside the Milky Way, it is tough for scientists to predict exactly where in our galaxy we sit. Astronomers are able to get a bird's-eye view of other galaxies, but we must use different...

Mystery Of Nearby SS Cygni Star System Finally Resolved
2013-05-23 13:22:47

John P. Millis, PhD for redOrbit.com — Your Universe Online In 1990 the Hubble Space Telescope measured the distance to a nearby star system known as SS Cygni. Composed of a low-mass main sequence star and a compact object known as a white dwarf — a stellar remnant about the mass of our Sun, but compressed to the size of the Earth. The distance measured by Hubble puzzled scientists, as the measured brightness of the system was considerably higher than expected. If correct,...

Young Universe Was A Massive Factory For Star Formation
2013-04-17 13:36:09

Lee Rannals for redOrbit.com — Your Universe Online Astronomers say they have discovered a star factory in a galaxy so distant that they see it when the Universe was only six percent of its current age of about 13.7 billion years old. The team wrote in the journal Nature that HFLS3 sits at about 12.8 billion light-years from Earth. They said the distant galaxy is producing about 3,000 Suns per year, which is more than 2,000 times that of our own Milky Way galaxy. "This is the...

Hubble Space Telescope Breaks Record For Furthest Supernova
2013-04-04 12:49:29

ESA/Hubble The NASA/ESA Hubble Space Telescope has broken the record in the quest to find the furthest supernova of the type used to measure cosmic distances. This supernova exploded more than 10 billion years ago (redshift 1.914), at a time the Universe was in its early formative years and stars were being born at a rapid rate. The supernova, designated SN UDS10Wil, belongs to a special class of exploding stars known as Type Ia supernovae. These bright beacons are prized by astronomers...

Astronomers Identify New Type Of Supernova 100 Times More Massive Than Our Sun
2013-03-26 13:30:57

Lee Rannals for redOrbit.com — Your Universe Online Astronomers discovered a new type of supernova of a star about 10 to 100 times more massive than our sun. The Type Iax supernova is a fainter and less energetic explosion than the Type Ia, and may not completely destroy the white dwarf star; type Ia supernovae completely destroy their tiny white dwarfs. "A Type Iax supernova is essentially a mini supernova," says lead author Ryan Foley, Clay Fellow at the Harvard-Smithsonian...

Methuselah Star Birth Certificate
2013-03-08 08:38:30

April Flowers for redOrbit.com - Your Universe Online The ink is drying on a brand new birth certificate for a star that's been around for a very long time. New calculations using NASA'S Hubble Space Telescope have enabled a group of astronomers to take an important step closer to reconciling the age of this star, and the age of the Universe. "We have found that this is the oldest known star with a well-determined age," said Howard Bond of Pennsylvania State University in University...

Are We There Yet? Astronomers Measure Distance To Neighboring Galaxy
2013-03-06 12:13:52

[ Video 1 ] | [ Video 2 ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers have now accurately measured the distance to our neighboring galaxy, the Large Magellanic Cloud (LMC). Scientists have struggled with trying to find an accurate distance to the LMC, which is one of the nearest galaxies to the Milky Way. However, a team of astronomers used observations of a rare class of double star, known as eclipsing binaries, to determine that LMC lies 163,000 light-years...

Scientists Recreate Spiral Arms Of Ancient Milky Way
2013-03-04 19:11:57

Brett Smith for redOrbit.com — Your Universe Online Using observations made possible by the European Space Agency´s INTEGRAL satellite, a pair of French scientists has been able to recreate how the Milky Way´s spiral arms looked millions of years ago. According to their report in the Astrophysical Journal, the two researchers based their recreation on the observations of high mass X-ray binaries (HMXBs), pairs of massive stars that are surrounded with the remnants of...

Astronomers Discover White Dwarf Supernovae
2013-02-27 20:00:36

Lee Rannals for redOrbit.com — Your Universe Online White dwarf supernovae that occurred millions of years ago have popped up in the Virgo Cluster galaxy and part of the sky labelled as "anonymous." Southern Methodist University (SMU) researchers say they've confirmed two bright stars that showed up in our skies in February and November are supernovae. Supernovae are the result of stars that have reached the end of their life, resulting in a large explosion that can consume...

Latest Cosmic distance ladder Reference Libraries

2010-09-13 16:56:08

The Coma Cluster (Abell 1656), along with the Leo Cluster, is one of two major clusters compromising the Coma Supercluster. It contains over 1000 identified galaxies. Most of the galaxies in the center of the Coma Cluster are elliptical galaxies including both dwarf and giant. However the center is dominated by NGC 4874 and NGC 4889, two giant elliptical galaxies. The brightest galaxies are visible, a few degrees north of the galactic pole, with an amateur telescope larger than 20 cm. The...

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