You are here:
I can answer most questions about space flight and planetary exploration from an astronomy standpoint, but not from a computer or electronics standpoint. No astrology questions please, or questions about alleged UFO identifications.
Astronomy, my main catagory, has been my hobby and pastime for over 50 years. Taught astronomy and meteorology at the University level for over 13 years.
President- Erie County Mobile Observers Group for over 15 years. Also on allexperts.com astronomy catagory for over 8 years.
Astronomy Technology Today and also wrote the "Over Erie Skies" column in our local newspaper for 11 years.
BS Metallurgical Engineering Grove City College, PA Master's Degree, Gannon University, Erie, PA Also retired USAF pilot, 20 years.
Discoverer of the mini-coathanger asterism in Ursa Minor; also the mini-dipper asterism up in the bowl of the Little Dipper.
We are witnesses to the beginning of the space age, October 4, 1957 until the present. This activity will eventually lead to both interplanetary flight over the next century, followed by interstellar flight in the 22nd century. But our generation, the generation of the 1950's....gave space exploration it's initial start.
97% of this Universe is still hydrogen and helium left over from the Big Bang; only 3% are "heavies" from Lithium (3) to Uranium (92). Perhaps we are lucky to be here this 'early' under those circumstances. In addition, 13.7 billion years ago, after Big Bang, is starting to sound like a very short time frame in the total lifespan of our Universe.
Hi Sora, A thermal emission at the quantum level at the event horizon of a black hole. Can be demonstrated mathematically, but has not been observed... probably very difficult to observe directly, similar
Hi Bob, I can only speak for USAF flight school from back in the mid-1960's, however I believe there has been little change in those requirements too. I really don't know about tattoo's, never ever having
With a straight line cable, you'd already be traveling close to 17,500 mph (relative to the Earth's surface) at the 200 mile high point, would you not? Otherwise the cable wouldn't remain a straight line
Yes, I believe it's exactly 22,236 miles high, and it's a geostationary orbit, not a geosynchronous orbit... there is a minor difference, see http://www.wisegeek.com/what-is-geostationary-orbit.htm So
Hi Paul, I'm not up on the latest design of space elevators, but I believe there would have to be a counterweight in geosynchronous orbit equal to the weight of the cable and the elevator cab. Actually
Answers by Expert:

©2012 About.com, a part of The New York Times Company. All rights reserved.