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Latest Physical cosmology Stories

Stellar Motions In Outer Halo Reveal Evidence Of Milky Way Evolution
2013-02-22 11:40:05

April Flowers for redOrbit.com - Your Universe Online Astronomers using NASA's Hubble Space Telescope to peer deep into the vast stellar halo that envelopes our galaxy have uncovered tantalizing evidence for the possible existence of a shell of stars that are a relic of cannibalism by our Milky Way. For the first time ever, Hubble was used to gain precise measurements of the sideways motion of a small sample of stars located far from the galaxy's center. The unusual lateral motion of...

Astronomers Create 3D Image Of Quasar
2013-02-19 04:09:56

Lee Rannals for redOrbit.com - Your Universe Online Astronomers using the Subaru Telescope recently obtained a three-dimensional view of a distant gravitationally-lensed quasar and discovered complex structures inside outflows coming from the nucleus. The team used the large telescope to observe quasar SDSS J1029+2623, which sits 10 billion light-years away from Earth in the constellation Leo. By using the gravitational lensing technique, astronomers were able to look at this far away...

MOND Theory Predict Key Property In Andromeda's Satellites
2013-02-15 11:58:01

April Flowers for redOrbit.com - Your Universe Online A research collaboration between Case Western University and Weizmann Institute of Science has used modified laws of gravity to closely predict a key property measured in faint dwarf galaxies that are satellites of the nearby giant spiral galaxy Andromeda. The study centers around the property of velocity dispersion, which is the average velocity of objects within a galaxy relative to each other. Velocity dispersion is by used...

Dark Matter Detector Science Teams Named
2013-02-13 04:30:54

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online In order to illuminate the darkness we turn to the light. Whether the sun, a lamp, or a candle, we rely on electromagnetic radiation to reveal the world, and indeed the Universe, around us. Everything that we see - every tree, every planet, and every star - we see because it emits, reflects, bends and focuses light to our eyes. Without the interaction of matter with light, we are blind. But what about matter that...

2013-02-06 10:01:30

Ever since Austrian scientist Erwin Schrodinger put his unfortunate cat in a box, his fellow physicists have been using something called quantum theory to explain and understand the nature of waves and particles. But a new paper by physics professor Andreas Albrecht and graduate student Dan Phillips at the University of California, Davis, makes the case that these quantum fluctuations actually are responsible for the probability of all actions, with far-reaching implications for theories...

Lack Of Dwarf Galaxies Around Milky Way Perplexes Physicists
2013-02-01 11:48:09

Brett Smith for redOrbit.com - Your Universe Online Studying the physics of the universe can be a controversial and often contradictory proposition, with theories and calculations often not matching with observations. However, new research from Leibniz Institute for Astrophysics Potsdam in Germany, has shed some light on one situation involving differences between theory and observation. Scientists at the institute have found that a phenomenon known as “cosmic web...

Facts About Black Holes Podcast
2013-01-28 09:23:01

John P. Millis, Ph.D. for redOrbit.com — Your Universe Online Click here to stream "Facts About Black Holes — Separating Myth From Reality" (Or right-click on the above link to download the file to your computer) When most people think of a black hole, they tend to envision it as sort of cosmic vacuum cleaner, slowly sucking in and devouring everything in its vicinity. But are black holes really like this? And what would happen if you fell into a black hole? What about a...

Galaxy Formation And Evolution Models Garner Award For Rutgers Astronomer
2013-01-25 07:55:22

Lee Rannals for redOrbit.com - Your Universe Online A Rutgers University astronomer has created computer models and simulations that help to explain how galaxies formed and evolved. Astronomer Rachel Somerville, who works as a professor of astrophysics in the Department of Physics and Astronomy, School of Arts and Sciences, created these models to show how gases like hydrogen and helium coalesce into stars and galaxies and how exploding stars and black holes impact their galactic...

NASA Joins ESA In Euclid Mission
2013-01-24 12:37:25

Lee Rannals for redOrbit.com - Your Universe Online NASA and the European Space Agency (ESA) are partnering up on the Euclid mission to investigate dark matter and dark energy together. The Euclid space telescope will launch in 2020 with about a 4-feet-diameter telescope and two scientific instruments that will map the shape, brightness and 3D distribution of two billion galaxies. With the mission, "scientists hope to solve key problems in our understanding of the evolution and fate...


Latest Physical cosmology Reference Libraries

Cosmology
2014-01-12 00:00:00

Image Caption: The Hubble Extreme Deep Field (XDF) was completed in September 2012 and shows the farthest galaxies ever photographed by humans. Each speck of light in the photo is an individual galaxy, some of them as old as 13.2 billion years; the observable universe is estimated to contain more than 200 billion galaxies. Credit: NASA/Wikipedia What is Cosmology? I once commented to an acquaintance that I was fascinated by the field of Cosmology, and mused that if I had more time, I...

45_d4a20fda769b165e44826492e9e54549
2010-09-16 15:18:29

The Virgo Cluster consists of galaxies at a distance of around 59 Mly away in the constellation Virgo. Containing between 1300 to 2000 galaxies the Virgo Cluster is the heart of the Local Supercluster. Its mass is estimated at 1.2 × 1015 M☉ out to 8 degrees of the cluster's center or a radius of about 2.2 Mpc. Most of the brighter galaxies in the cluster were discovered by Charles Messier in the late 1770's and early 1780's, including the giant elliptical Messier 87. Messier...

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...

67_4ae26d06e7989cbc4cd9f57abd6295f5
2010-09-08 16:02:39

As of 2009, JKCS 041 is a group of galaxies with the distinction of being the farthest away group from Earth ever observed. Seen at redshift 1.9, it is estimated to be 10.2 billion light years away. The cluster is located within the constellation Cetus at a photometrically determined redshift of z=1.9 at right ascension 2h 26m 44s declination -04° 41"² 37"³ (J2000.0).

45_b90d45a4e7d89d873d39705549e516ce
2014-01-12 00:00:00

Sample Entry: Astronomy is the scientific study of stars, planets, comets, galaxies, and other phenomena that occur outside Earth's atmosphere (e.g. cosmic radiation). Astronomy deals with the evolution, physics, chemical makeup, meteorology, and motion of celestial objects, and also the formation of the universe. The word Astronomy comes from the Greek words astron (meaning "star") and nomos (meaning "law"). Astronomy is one of the oldest sciences. Since the dawn of man, people always...

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Word of the Day
bibliopole
  • A bookseller; now, especially, a dealer in rare and curious books.
This word comes from a Greek phrase meaning 'book seller.'
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