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Nasa Shares Rare View Of Saturn's Rings. Nasa's Cassini spacecraft, which has been in orbit around Saturn for more than eight years, has delivered a rare backlit view of the planet and its rings.

Nasa Shares Rare View Of Saturn's Rings

The image was taken during Cassini's 174th orbit around the gas giant when it was deliberately positioned within Saturn's shadow. The US space agency said on its website: "It was the perfect location from which to look in the direction of the sun and take a backlit view of the rings and the dark side of the planet. "Looking back towards the sun is a geometry referred to by planetary scientists as "high solar phase"; near the centre of your target's shadow is the highest phase possible. "This is a very scientifically advantageous and coveted viewing position, as it can reveal details about both the rings and atmosphere that cannot be seen in lower solar phase. " The mosaic picture is composed of 60 images taken in violet, visible and near-infrared colours. "They unveil a rare splendour seldom seen anywhere else in our solar system.

" Voyager - The Interstellar Mission. Pioneers 10 and 11, which preceded Voyager, both carried small metal plaques identifying their time and place of origin for the benefit of any other spacefarers that might find them in the distant future.

Voyager - The Interstellar Mission

With this example before them, NASA placed a more ambitious message aboard Voyager 1 and 2-a kind of time capsule, intended to communicate a story of our world to extraterrestrials. The Voyager message is carried by a phonograph record-a 12-inch gold-plated copper disk containing sounds and images selected to portray the diversity of life and culture on Earth. The contents of the record were selected for NASA by a committee chaired by Carl Sagan of Cornell University, et. al. Dr. Wissen                        =                  knowledge. BBC Space – Explore the planets, black holes, stars and more. Stargazing LIVE. BBC Two Programmes - Stargazing LIVE: Series 2. Astronomy’s biggest name.

3D World - The Magazine for 3D Artists. Journey through the Universe l National Center for Earth and Space Science Education. A Virtual Journey into the Universe. As of July 1, 2013 ThinkQuest has been discontinued.

A Virtual Journey into the Universe

We would like to thank everyone for being a part of the ThinkQuest global community: Students - For your limitless creativity and innovation, which inspires us all. Teachers - For your passion in guiding students on their quest. Partners - For your unwavering support and evangelism. Parents - For supporting the use of technology not only as an instrument of learning, but as a means of creating knowledge. We encourage everyone to continue to “Think, Create and Collaborate,” unleashing the power of technology to teach, share, and inspire. Best wishes, The Oracle Education Foundation. National Geo - universe. SETI Institute. SETI@home. Space: SETI: The Drake Equation. Universe - The Drake equation (pictures, video, facts & news) Out of the ordinary...out of this world. Space and NASA News – Universe and Deep Space Information.

Black Holes. NOTE: This section is about stellar-mass black holes.

Black Holes

For information about black holes that measure in the billions of solar masses, see Active Galaxies & Quasars . There are many popular myths concerning black holes, many of them perpetuated by Hollywood. Television and movies have portrayed them as time-traveling tunnels to another dimension, cosmic vacuum cleaners sucking up everything in sight, and so on. It can be said that black holes are really just the evolutionary end point of massive stars. But somehow, this simple explanation makes them no less mysterious, and no easier to understand. Black holes: What are they? Black holes are the evolutionary endpoints of stars at least 10 to 15 times as massive as the Sun. But contrary to popular myth, a black hole is not a cosmic vacuum cleaner. The Schwarzschild radius can be calculated using the equation for escape speed: vesc = (2GM/R)1/2 R = 2GM/c2 If we can't see them, how do we know they are there?

Last Modified: December 2010. Explore the Night Sky With Stellarium. Have you ever looked up at the night sky wondering where those elusive constellations are?

Explore the Night Sky With Stellarium

Do you wonder what that really bright star (or planet) is called? With Stellarium, you will wonder no longer! You may have heard of Celestia, a great program that lets you leave planet Earth and explore space from beyond. Stellarium is similar to Celestia in some ways, but it allows you to view and explore the night sky exactly as it would appear from any location on Earth. Like Celestia, it is also available for Linux, Mac OS X, and Windows. When you first launch Stellarium, you’ll find that you are looking at the sky as it appears in Paris, France. Earth. Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes. What is a white hole? I have read a lot about Black holes and have gained wisdom of the subject.

What is a white hole?

My question- are there such things as white holes- and if so- what do they do? Before I answer this question I would like to point you to Kate Becker's discussion of why it is so hard to understand the expansion of the universe. The exact same argument applies here. White holes are not something that it is possible to understand using physical intuition. White hole.

In general relativity, a white hole is a hypothetical region of spacetime which cannot be entered from the outside, although matter and light can escape from it.

White hole

In this sense, it is the reverse of a black hole, which can only be entered from the outside, but from which nothing, including light, can escape. White holes appear in the theory of eternal black holes. In addition to a black hole region in the future, such a solution of the Einstein field equations has a white hole region in its past.[1] However, this region does not exist for black holes that have formed through gravitational collapse, nor are there any known physical processes through which a white hole could be formed. Like black holes, white holes have properties like mass, charge, and angular momentum. In quantum mechanics, the black hole emits Hawking radiation and so can come to thermal equilibrium with a gas of radiation.

Origin[edit] 1980s – present speculations[edit] See also[edit] References[edit] External links[edit] White Holes and Wormholes. Stabilizing a wormhole with exotic matter In principle, a wormhole could be stabilized by threading its throat with `exotic matter'.

White Holes and Wormholes

Voyager - The Interstellar Mission. Fermilab. Little Atoms. Professor Brian Cox- The School of Physics and Astronomy University of Manchester. Astronomie.