Link List Labor
US Vereinigte Staaten von Amerika, États-Unis, United States
Astronomie, Astronomie, Astronomy

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astronautix - Raumfahrt-Enzyklopädie

(E?)(L?) http://www.astronautix.com/spaceflt.htm

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earthweb - Count Down for manned launch to Mars

(E?)(L?) http://webdeveloper.earthweb.com/webjs/item/0,,12751_102291_viewit,00.html
(E?)(L?) http://news.bbc.co.uk/1/hi/sci/tech/876112.stm
Link to BBC News

Nasa

The best time for the first manned mission to Mars will be in 2014, says James Longuski of Purdue University in the US.
This is because the position of the planets will provide an escape route back to Earth in the event of an accident.
Because of an alignment of Earth, Mars and Venus, a so-called gravitational slingshot manoeuvre would take astronauts to Mars and, if needed, bring them home safely.
According to Professor Longuski, the emergency flight path would only be possible if the spacecraft was launched within a few days of 14 January 2014.
Via Venus
Orbital calculations show that no similar escape option exists for at least a decade before or after 2014. This means that astronauts might be forced to attempt a landing on Mars even if their spacecraft became crippled in an accident on the way to Mars.
"This trajectory is remarkably fortuitous as it does not exist for many years prior to or after the 2014 date," Professor Longuski said.
Nasa has also identified 2014 as a possible launch date for the first human mission to Mars in a 1997 study.
Professor Longuski discovered that the safest route to take would be one that permitted a quick return trip, via Venus, in case of an accident that forced the Mars landing to be aborted.
If that happened, the Martian gravity would change the spacecraft's trajectory, hurling it toward Venus, where another gravity assist would return the spacecraft back to Earth.
The gravity assist would allow a safe return to Earth even if the spacecraft's main rocket engine failed, Professor Longuski said.
Currently, Nasa has small-scale studies but no plans for a manned mission to Mars. Many experts say that it is too late to organise a mission in 2014. But the advantages of that date may force Nasa to look again at manned flights to Mars

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johnpratt - Astronomy

(E?)(L?) http://www.johnpratt.com/items/astronomy/

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newscientist - New Scientist - Everyday Scientific Phenomena
Universe Phenomena

"Warum fallen schlafende Vögel nicht vom Baum?" und
"Was macht die Mücke beim Wolkenbruch?"

Am 10.06.2004 waren folgende Artikel unter "Topic: Universe" aufgeführt:

Results 1 to 15 of 44

Door to the cosmos: Is it an anecdotal story that the US put the metal door of a nuclear test chamber into orbit before Sputnik?

Blast in the past: My father's dental surgery was struck by a ball of flame, destroying the chimney and producing sparks from wall sockets. He says it wasn't a meteorite, so what was it?

Lonely planet: Why does Venus rotate on its axis in the opposite direction to all the other planets?

Moonshift: Is it true that the Moon is slowly moving away from the Earth?

Big rock: Why does our Moon have no name?

Nuke 'em: Could we deflect asteroids with nuclear missiles?

Rock around the earth: Why is the moon round?

Lots of space: Why objects collide in space, when space is so big

The moonies: Why a gibbous moon appeared unusual

Chinese puzzle: Is it true that the Great Wall of China is the only man-made object visible from space?

Star turn: Naming and numbering the stars

Moon's up: The strange appearance of a gibbous moon

Space talk: Why are more recent broadcasts of the same space journies better quality than the orignal broadcasts?

Moonfleet: When flying from Hawaii to California just before dawn, a half-moon appeared and shone across the water. What was it?

Light show: Why are the Northern and Souther Lights both made up of changing colours?

Results 16 to 30 of 44

Moonlit colour 2: Is there such thing as a lunar rainbow?

Moonlit colour 1: The strange effect of an inverse rainbow above the Moon

We have a problem: How do astronauts keep on course?

Wavy train: Why do spacecrafth paths appear as wavy lines on Mission Control's map?

New star: Seeing the International Space Station...

Flight path: Why do rockets take off straight up?

Well lit: Does standing at the bottom of a well allow you to see the stars in daytime?

Light star: If the sun is a star like any other, why is it yellow, not white?

Belly flop: Why does the space shuttle roll over after launch?

Leading astray: What do the different parts of a computer lead do?

Moonflight: How high and how fast would I have to jump to escape the moon's pull?

No more Moon: What would be the effect on the Earth if an alien spaceship came along and dragged the Moon away?

Wonderspace: Is it necessary to wear a bra in space?

Boom...hiss: How loud was the big bang?

Beaming: Why does the same side of the moon always face Earth?

Results 31 to 44 of 44

Moonbeams: Why does the Moon seem brighter than the clouds?

The truth is out there: Why are Martians traditionally portrayed withgreen skin?

Boom boom: Why does the space shuttle returning to Earth cause two separate sonic booms?

Pulling power: How rockets get out of the Earths gravitational field

Major toms: What happens to a body in space?

Snowballs from Space: Is the theory that all the Earth's water was brought here by comets, true?

Magnificent man: How much helium would you need in a balloon to lift an adult into the air and how much would you need to simulate moon walking?

One small step: How long will astronauts' footprints on the Moon's surface remain there?

Sky surprise: During the eclipse I saw three pink balls of light floating in mid air? What were they?

Space hop: What would happen to a pint of beer in space?

Alternative currents: What exactly happens when solar plasm supplies disrupt electricity supplies?

Moon blues: Is a blue moon possible and if so, what atmospheric conditions are necessary and how often could it happen?

Heat reduction: When spacecrafts return to Earth--why cant they employ an opposing thrust to counteract Earths gravity?

Gee! Force!: How do the forces of a fairground ride compare to those experienced by astronauts?

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universetoday - Space News from Around the Internet Updated Every Weekday

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wolfram - Astronomy-Dictionary

(E?)(L?) http://scienceworld.wolfram.com/astronomy/
(E?)(L?) http://scienceworld.wolfram.com/astronomy/letters/

Link List Labor
US Vereinigte Staaten von Amerika, États-Unis, United States
Astronomie, Astronomie, Astronomy

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astronautix - Raumfahrt-Enzyklopädie

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earthweb - Count Down for manned launch to Mars

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johnpratt - Astronomy

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newscientist - New Scientist - Everyday Scientific Phenomena
Universe Phenomena

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universetoday - Space News from Around the Internet Updated Every Weekday

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wolfram - Astronomy-Dictionary

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Link List Labor US Vereinigte Staaten von Amerika, États-Unis, United States Astronomie, Astronomie, Astronomy

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astronautix - Raumfahrt-Enzyklopädie

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earthweb - Count Down for manned launch to Mars

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johnpratt - Astronomy

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newscientist - New Scientist - Everyday Scientific PhenomenaUniverse Phenomena

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universetoday - Space News from Around the Internet Updated Every Weekday

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wolfram - Astronomy-Dictionary

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Link List Labor
US Vereinigte Staaten von Amerika, États-Unis, United States
Astronomie, Astronomie, Astronomy

newscientist - New Scientist - Everyday Scientific Phenomena
Universe Phenomena