Best answer: No. We are stuck in our own personal current times. Time is defined by on-going events. As the events of the past are done deals, there is no time in the past. As the events of the future are yet to unfold, there is no time in the future. We cannot go beyond our own personal time, the current, because there is nowhen to go to in the past or future. They do not exist.

You might have heard of time dilation as a way to travel into the future. Not so. The best the traveler can do is catch up with the present time of the observer in the observer's time line. And that's not the future of the traveler's timeline. To got into the future the traveler would have to go into the future of his personal time line. And that's not happening in time dilation.

Best answer: The sun warms us.
Without it, the Earth would freeze to about 3 degrees Kelvin (minus 270 C)
No life on earth would survive.

The moon gives us some light at night and contributes about 50% of the ocean tides (the sun contributes the other 50%. If the moon just disappeared, the earth's orbit around the sun would change. At present the Earth and Moon orbit their common center of gravity (barycenter). Without the moon our orbit around the sun could end up more circular, or more elliptical. And with the loss of the moon's mass, Earth's orbit would move futher from the sun . It would on average be 81/80ths further from the sun.

Best answer: 186,000 miles per second
186,000 x 365 x 24 x 60 x 60 miles per year
= 5865696000000 (using my calculator
= 5.865696 x 10^12 miles/year

Best answer: No.
But it is possible.
The main objection is that we have not yet been visited by a traveler from the future. And assuming time travel becomes possible in the future - then time travel would happen to the past (our present).

Another objection is "how would we know:.
If someone traveled back to 1920 and killed Hitler - then WW2 would not have happened, and we would be on a different time line. And most of us would probably not even exist.

Best answer: Doubt they exist. I once met Betty Hill. Not a believable source

Best answer: The best reason would be to shield a radio observatory from the very noisy Earth...
And "Dark side" doesn't mean that there's no light - it was referred to as 'dark' in that we had no information about the far side (until the Russians did the first fly-by in 1959).

But that means, what?