A speculative structure based on Einstein's field equations; a tunnel with two points in spacetime.
All of space, time and their contents, including planets, stars, galaxies.
Einstein's relativity theory teaches that motion through space actually creates alterations in the flow of ________.
2 wds.A region of space having a gravitational field so intense that no matter or radiation can escape it.
A star and the most important source of energy for life on Earth.
A rocky body orbiting the sun; large numbers are found in a belt between Mars and Jupiter.
2 wds. A circumstellar disc in the Solar System similar to the asteroid belt but way more massive.
A satellite of the Earth, visible chiefly at night that reflects light from the sun.
Uranus holds the record for being the planet ____est in our Solar System.
A giant ball of hot gas and plasma twinkling in the sky.
A small body of matter from outer space that enters earth's atmosphere burning up and incandescent.
Massive & remote celestial objects with a starlike image in a telescope emitting energy.
Fictional artificial intelligence character in the Space Odyssey series begin. 1968.
Something artificial placed in orbit to go around the earth or moon to collect various information.
2 wds. Meteors before they burn up in our Earth's atmosphere.
A star showing a sudden large increase in brightness and then slowly returning to its original state again.
A system of billions of stars together with gas and dust is held together by gravity.
2 wds. Physical universe that's beyond the earth's atmosphere.
2 wds. Swiss born writer & ufologist with appearances on tv's "Ancient Aliens".