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Latest Cosmic distance ladder Stories

Milky Way In 3D
2013-09-13 11:09:37

John P. Millis, PhD for redOrbit.com - Your Universe Online Because of our location within the Milky Way, it is quite a challenge to get a bird’s eye view of our galaxy. To really get a sense for what our corner of the cosmos really looks like, astronomers have to take detailed measurements of billions of stars and attempt to accurately measure their distance from Earth. Researchers at the Max Planck Institute for Extraterrestrial Physics (MPE) have now created the most detailed model...

New Theory Explains Expansion Of Universe
2013-09-10 08:47:37

John P. Millis, PhD for redOrbit.com - Your Universe Online For the better part of a century the astronomical community has understood that the Universe is expanding, yet the exact nature of this expansion has been difficult to quantify. One extreme instance of this is the acceleration of galaxies receding from us billions of light-years away. But even looking closer to home, calculating the rate of expansion has proven difficult. Traditionally, scientists, measuring the recession...

Unraveling Galactic History Begins With A Black Hole's Spin
2013-07-30 14:11:38

Brett Smith for redOrbit.com - Your Universe Online A supermassive black hole is believed to sit at the center of each large galaxy, and a new technique designed to detect the dark abyss' spin could be the key to unraveling a galaxy's history. While black holes cannot be seen directly, their behavior can be determined by looking at how they affect nearby objects. A paper published in Monthly Notices of the Royal Astronomical Society describes a new technique that was developed by...

Generation Gap In Stars' Orbital Dance
2013-07-19 05:52:28

[ Watch the Video: Zoom into 47 Tucanae ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers using NASA's Hubble Space Telescope are tracking the orbital motion of 33,000 stars in one of the Milky Way's oldest globular clusters. The team will be using the space observatory to track the orbital motion of 33,000 stars within globular cluster 47 Tucanae, which sits over 16,000 light-years away from Earth. "When analyzing the motions of stars, the longer the time baseline...

2013-07-18 23:00:32

“How to Understand the True Cosmos” aims to dispel misconceptions in astrophysics. Massachusetts (PRWEB) July 19, 2013 The rapid pace of scientific advancement in the field of astrophysics, and the new discoveries in the field and its sheer complexity has resulted in the obsolescence of many theories and models previously used to explain the nature of the universe and the celestial bodies within its expanse. With How to Understand the True Cosmos, Dr. Sol Aisenberg aims to improve the...

Dark Energy Survey Will Look For Supernovae
2013-07-01 18:32:12

John P. Mills, Ph.D. for redOrbit.com - Your Universe Online The greatest cosmological puzzle of the 21st century continues to be to measure, characterize and understand the source of dark energy, the apparent force that is driving the accelerating expansion of the Universe. One of the problems is that in order to make accurate measurements of the expansion rate, astronomers must measure the motions of distant galaxies, some near the very edge of the known Universe. At such great...

How Does Hydrogen Drive Star Formation In Galaxies
2013-06-13 05:00:58

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online A major field of study in astronomy seeks to understand how galaxies form and evolve. One advantage that we possess is that as we study the light from the most distant galaxies, we are effectively looking back in time, seeing the oldest galaxies in the Universe when they were still young. But there is a problem: the farther away the galaxies are, the more difficult they are to study. This is the issue faced by...

Supernova Light Echo Detected
2013-06-05 13:28:46

Lee Rannals for redOrbit.com - Your Universe Online Astronomers discovered light echoing off of material surrounding a recent supernova explosion, supporting the theory that exploding white dwarfs become unstable from matter donated by large non-degenerate stars. The team detected the light echo coming off of SN 2009ig, making it the sixth and most luminous discovered from a type Ia supernova. A light echo works similarly in principle to the more familiar sound echoes heard on Earth....

2013-06-04 12:21:04

WASHINGTON, June 4, 2013 /PRNewswire-USNewswire/ -- A flash of light from a stellar outburst has provided a rare look at the 3-D structure of material ejected by an erupting nova. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) Astronomers used NASA's Hubble Space Telescope to observe the light emitted by the close double-star system T Pyxidis, or T Pyx, a recurring nova, during its latest outburst in April 2011. A nova erupts when a white dwarf, the burned-out core of a...

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,...


Latest Cosmic distance ladder Reference Libraries

45_03c916cf051c1a581c0d52b3ccdd7561
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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