... consider is, if there had ever been a time when nothing existed then nothing would exist now. It is evident that nothing produces nothing. In light of this, since something exists now, it must follow logically that something has existed forever. As Sproul has remarked: "Indeed, reason demands that if something ... While its outer limits have not been measured, it is estimated to be as much as 20 billion light years in diameter (i.e., the distance it would take light to travel across the Universe at a speed of over 186,000 miles per second). There are an estimated one billion galaxies in t...

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• Approx Pages: 11
• Grade Level: High School

... since travel at huge speeds will no longer be energy prohibited. Now, would those ships be prohibited by the speed of light? Some physicists believe that it is possible to make space-time itself. This means to surround the spaceship with local space time in ... deep space travel times. This implies discovering a means to move a vehicle at or near the actual maximum speed limit for motion through space or through the modification of space-time itself. 3. Discover fundamentally new on-board energy production methods to power propulsion devices. This third goal ... To understand and fully ap...

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... dated back more than two hundred years. According to Einstein's general theory of relativity, space and time together can be regarded as forming a four-dimensional space called space-time, curved by the matter and energy in it. Also according to the theory of relativity, nothing can travel faster than the speed of light but most compact objects imaginable are predicted by General Relativity to have ... such strong gravitational force that nothing can escape them- not even light. For this reason, it is called a black hole; light, as a result disappears from the visible universe. John Mit...

• Word Count: 984
• Approx Pages: 4
• Grade Level: Undergraduate

... shielding us from cosmic rays (very energetic particles generated far away in the universe) which can cause damage to living cells. The shape of the heliosphere, although never fully observed, is thought to be like a protective bubble encasing the solar system. However, it isn"t symmetrical around ... out into a tail at the back, much like a planetary magnetosphere. Recent data from the Voyager 1 and 2 space probes have shed new light on the subject. Since 1992, fifteen years after their launch for a supposed four-year flight, they have begun picking up intense low-frequency ... of inte...

• Word Count: 682
• Approx Pages: 3
• Grade Level: Undergraduate