Time Travel - "A Sky Full Of Ghosts"
Think about how old the really Earth is...
Whether you're religious or not, we can all agree that compared to our lifespan, it's pretty damn old. Think of all the billions of people that have walked the very same ground you do. Since the beginning, man has always wanted to travel through time. Now, with today's technology, we finally have the power to do it! Well, kind of.
It all depends on your definition of time travel...
If you mean physically, we can't do that. Well not yet anyway, but we can view it!
Light Travel
The producer of Family Guy, Seth MacFarlane, produces another TV show on Netflix called 'Cosmos: A Spacetime Odyssey'. This post was inspired by an episode from Seth's series 'A Sky Full Of Ghosts', which explains this subject much further.
In this episode Neil deGrasse Tyson talks about how most of the stars you see every night aren't even shinning anymore. Some died long ago. Light can only travel so fast which means that at some distances in space, the images we're seeing from the stars can be from hundreds or even thousands of years ago.
Did you know there are more stars in the universe than grains of sand on this planet?
That's pretty huge considering the stars can be anywhere from the size of the Earth, to sizes bigger than you could even imagine.
This is the size of our galaxy the Milk Way...
and this is our galaxy compared to a small part of our observable universe.
There are estimated to be over 100 BILLION galaxies in our universe, some much bigger than our own.
The universe is about 46 billion light years long and constantly still expanding.When you're dealing with distances that wide, you'll hear the term 'light speed', which refers to the speed at which light travels. Light speed is 299,792 kilometers per second, or 670,615,605 miles per hour, which is an incredible distance in just a short amount of time when you really think about it.
So is time travel real?
Technically speaking, you could see any event that's ever taken place on Earthas long as you're far enough in space. Somewhere far out there, if you looked at our planet, you would see the Titanic sinking... If you traveled even farther, you'd see the Romans conquering the world.
If you went even further, you would see dinosaurs roaming around.
Maybe that's the reason no one wants to visit us...
What's your opinion?
Now that you have an idea of how big the universe is and how light speed works, I want to know your opinions on it!
Leave a comment and share with others!
Photos Credits:
www.static.dnaindia.com, www.sidereel.com, www.universetoday.com, www.astronomy.com
I was thinking the tile of the post was going to be a lovely, heartwarming story about our deceased loved ones (or ghosts), or stars in the sky. Sorry, I misread the title.
The thing about Neptune being 400 light years away isn't true. It is (250 light minutes). Light reflected on Neptune would take a little over 4 hours to reach Earth. The way you are saying it would mean that it would take a space craft 400 years to reach Neptune if it was traveling at the speed of light. Our solar system isn't that big.
Thank you sir for spotting that! You're completely right. Changes have been made
Yes, good post. I really like this quote from the movie Contact and Carl Sagan.
I love that! Thank you
Pretty mind-boggling, isn't it? What would you WANT to see most?
I think it would be cool to look at ancient Egypt during the building of the pyramids. It's time for some answers! What time would you want to go back to?
Pyramid construction time would be near the top of the list, but also Jesus, dinosaurs, and William Wallace's Scotland! (aye) Pretty random, but there are so many moments from history that would be mind-blowing to witness that it's hard to choose.
Cosmos is a great show, I personally like to watch it while I'm getting ready for bed. Very Relaxing. Great post! I'd REALLY love to see you write a post about your thoughts on DIMENSIONS!! Get to it.
"If you traveled even farther, you'd see the Romans conquering the world.
If you went even further, you would see dinosaurs roaming around.
Maybe that's the reason no one wants to visit us..."
LOL great points ;-) Thanks for a fresh and funny approach to the topic of time travel.
I would love to translate your post into Chinese and share it. This is a post on my project: https://steemit.com/cn/@anwenbaumeister/introducing-my-new-project-to-translate-wonderful-posts-into-chinese-let-s-increase-the-chinese-user-base-on-steemit
Feel free to message me on steemit.chat if you have any questions or are okay with me translating your post :-)
I have no problem with you translating this post! Just please mention my name:) I'm going to subscribe to you @anwenbaumeister
Awesome thanks so much! Of course I'll mention your name and provide a link to this original article. I'm also going to provide original authors 25% of SD made on my posts. However, it will not be on a post by post basis. I will pool 25% of all the SD that I make on all of my Chinese translation posts over the course of two weeks and then evenly distribute it to all of the original authors.
So in a week or so look out for some SD heading into your wallet 🙂
Thank you!