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That really helps. Thank you.
Are you a teacher? The way you explained those concepts really helps me understand it in a easier way.
Originally posted by jeenyus2008
reply to post by JayDub113
Thanks for attributing that . So you believe time travel is very plausible? I was thinking about that. If time travel was ever to be possible, we would have already seen tons of people from the future throughout our past.
Originally posted by DaveNorris
reply to post by Illustronic
i meant fictional space craft. for example, in star trek when 2 ships meet they are always up the same way. how? is this even possible in space?
The Sun and planets move
in a quasi-elliptical orbit between about 8.4 and 9.7 kpc from the galactic center, with a period
of revolution of about 240 million years. The solar system Is currently close to and moving
inward toward "perigalacticon," the point in the orbit closest to the galactic center
Perigalacticon is an apsis. It is the point in a star's orbit around a galaxy when it lies closest to the galactic center. The Sun is presently near its perigalacticon.
An apsis is the point of greatest or least distance of a body from one of the foci of its elliptical orbit. In modern celestial mechanics this focus is also the center of attraction, which is usually the center of mass of the system.