|Flight Plan||speed required|
|Earth to LEO (low Earth orbit)||17,000 mph|
|Earth to Earth escape||24,200 mph|
|Earth to lunar orbit||25,700 mph|
|Earth to GEO (geosynchronous Earth orbit)||26,400 mph|
A. Like any other object in low Earth orbit, a Shuttle must reach speeds of about 17,500 miles per hour (28,000 kilometers per hour) to remain in orbit.
there are no hours in space. an hour is a not too convenient unit that is 1/24th of one revolution by the earth on its axis of rotation. Earth gravity is not that strong so it should only dilate time by a little bit.
This is a well documented field, and the average maximum survivable g-force is about 16g (157m/s) sustained for 1 minute. However this limit depends on the individual, whether the acceleration is applied to one’s entire body or just individual parts and the time in which the acceleration is endured over.
So will it ever be possible for us to travel at light speed? Based on our current understanding of physics and the limits of the natural world, the answer, sadly, is no. … So, light-speed travel and faster-than-light travel are physical impossibilities, especially for anything with mass, such as spacecraft and humans.
The pay grades for civilian astronauts are GS-11 through GS-14, based on academic achievements and experience. Currently, a GS-11 astronaut starts at $64,724 per year; a GS-14 astronaut can earn up to $141,715 in annual salary [source: NASA].
Long-term exposure causes multiple health problems, one of the most significant being loss of bone and muscle mass. Over time these deconditioning effects can impair astronauts’ performance, increase their risk of injury, reduce their aerobic capacity, and slow down their cardiovascular system.
That ~18 billion light-year figure is the limit of the reachable Universe, set by the expansion of the Universe and the effects of dark energy.
A common definition of space is known as the Kármán Line, an imaginary boundary 100 kilometers (62 miles) above mean sea level. In theory, once this 100 km line is crossed, the atmosphere becomes too thin to provide enough lift for conventional aircraft to maintain flight.Feb 22, 2016
One of the fastest planned spacecraft on Earth is the Parker Solar Probe. This probe might reach a maximum speed of 430,000 mi / 692,017 km per hour. This means that the spaceship may get to the Sun in around 216 hours or nine days.
speed of light
Laser beams travel at the speed of light, more than 670 million miles per hour, making them the fastest thing in the universe.Jun 22, 2020
Wormholes are consistent with the general theory of relativity, but whether wormholes actually exist remains to be seen. … Theoretically, a wormhole might connect extremely long distances such as a billion light years, or short distances such as a few meters, or different points in time, or even different universes.
In Summary: Yes, time travel is indeed a real thing. But it’s not quite what you’ve probably seen in the movies. Under certain conditions, it is possible to experience time passing at a different rate than 1 second per second.
|Michael R. Clifford|
|Alma mater||USMA, B.S. 1974 Georgia Tech, M.S. 1982|
The light-second is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in one second, and is equal to exactly 299,792,458 metres (983,571,056 ft).
The first planet they land on is close to a supermassive black hole, dubbed Gargantuan, whose gravitational pull causes massive waves on the planet that toss their spacecraft about. Its proximity to the black hole also causes an extreme time dilation, where one hour on the distant planet equals 7 years on Earth.
An upwards acceleration of about 5g is enough to overwhelm the ability of your heart to pump blood to your brain. … The blood pools in your head, your face swells up and your lower eyelids are forced over your eyes. This is called ‘redout’ because all you see is the light shining through your eyelids.
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