Deep Space Astronomy
Latest Contributing Articles
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Use Your Home Computer to Find Aliens
With seti@home, download the BOINC client and use your home computer's spare capacity to analyze data from the Arecibo radio telescope, to find signals from aliens.
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A Collision of Galaxies
A vast cloud of gas, perhaps big enough to be a galaxy in its own right, is colliding with the outer edges of the Milky Way.
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Faster Than Light Expansion of the Universe
Although Einstein's special relativity says that nothing can move through space faster than light, space itself can expand and carry away galaxies faster than light.
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The Chandra X-ray Observatory
Capturing the visible light spectrum through the Hubble telescope shows amazing images, but the Chandra X-ray telescope captures even more impressive images.
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The Astronomy of the Local Group
The Milky Way Galaxy is one of 30-35 galaxies that are in the space neighborhood known as the Local Group. Here are some interesting facts about this "neighborhood."
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NASA Search for ExoPlanets, The Kepler Mission
In March 2009 NASA launched a space probe, Kepler, that would look for earth-like planets in the Milky Way galaxy.
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How to See a Black Hole
How do astronomers see black holes? Less paradoxical than it appears but still extraordinary, telescope teams around the world are uncovering the heart of the Milky Way.
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The Search for Extraterrestrial Intelligence
SETI, or the Search for Extraterrestrial Intelligence, is the collective name for a number of on-going projects dedicated to the search for extraterrestrial life.
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NASA Takes Steps Toward Interplanetary Internet
According to the National Aeronautics and Space Administration, it soon might be possible to communicate to planets millions of miles from Earth.
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Couperose Behandlung - Besenreiser veröden
Besenreiser sind nur ein ästhetisches Problem. Im Gesicht heißen die roten Äderchen Couperose. Man kann sie durch Laser-Behandlung oder Schaumverödung entfernen.
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Galactic Mergers in the Universe
Though it's a hefty two billion years away, the future event that has astronomers buzzing is the expected galactic merger of the Milky Way and the spiral Andromeda Galaxy
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Pulsars and Neutron Stars
How these remnants of a dead star get formed.
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Event Horizon and Photon Sphere
A static isolated black hole has an event horizon or Schwarzschild radius surrounded by a photon sphere.
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Black Hole Singularity
Inside the event horizon or Schwarzschild radius of a static isolated black hole the mass of the collapsed star is compressed into a singularity point.
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Origin of the Idea of Black Holes
Michell first suggested the idea of black holes in 1783. Schwarzschild's exact solution to Einstein's general relativity equation led to the prediction of black holes.
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Discovery of Astronomical X-Rays
The discovery, in the early 1960s, of the first celestial X-ray sources led to the first star identified as a likely black hole candidate, Cygnus X-1.
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X-Ray Flickering in Cygnus X-1
Identifying the star HDE226868 as the optical counterpart to the astronomical X-ray source, Cygnus X-1, was the first step in identifying it as a black hole.
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Black Hole or Neutron Star
Measuring the mass of the unseen companion in a binary X-ray source, such as Cygnus X-1, tells us if it is a black hole or a neutron star.
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Supernova Destroys Star Rho Cas
10,000 light years away, the yellow hypergiant star, Rho Cassiopeiae ("Rho Cas" a type F8-G2 Ia0 star,) has a fantastic chance of already having blown itself apart.
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Black Holes Space/Time Distortion
Like sharks in the ocean millions of Black Holes wander the universe. And like those creatures the universe needs these galactic wanders to maintain stability.
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Is the Universe Expanding
NASA proves the existence of Dark Matter. Scientific observations indicate the universe is infinitely expanding and quite open.
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The Circle of Life The End
As with all life in the Cosmos, the ending depends largely on the life that was led.
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The Circle of Life The Beginning
"We are made of star stuff...atoms heavier than hydrogen were created in the interiors of stars and then expelled into space to be incorporated into later stars."
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Feeding Black Holes
Like the footsteps in the snow of an invisible man, feeding black holes are easily seen
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Stellar Populations in the Galaxy
During World War II, Baade discovered that there were distinct stellar populations: The older Population II stars and Younger Population I stars.
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