Yes, it is only possible to view the past. We cannot view the future, and by the time we see the present, it is already the past. However, is you want to view a specific period in history, that will probably only be possible if you first achieve faster than light travel. (www.physics.stockexchange.com)
NASA Solar Probe becomes the fastest object built : 244,255 mph ( 5/2/21) (www.cnet.com)
The speed of light in a vacuum commonly denoted as c, it is a universal physical constant important in many areas of physics. Its exact value is defined as 299,792,458 meters / second. Also, speed of light: 186,000 miles per second or 671,000,000 miles per hour. (Wikipedia)
Lets compare these numbers. Our fastest vessel available travels at 244,255 miles per hour versus the needed 671 million miles per hour to reach the speed of light. It’s obvious that our most advanced technology is an infant when compared to what we need to achieve for time travel conditions. Yet, since everything that is going to happen already has, it’s plausible that the needed technology has been invented in the future and they can see us.
If you could, would want to travel to the past, even if this past could not be altered? I do wonder if we could see a past from the future that we are not a part of. A past after our death.
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