A Quote by Neil deGrasse Tyson
That is a big question we all have: are we alone in the universe? And exoplanets confirm the suspicion that planets are not rare.
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The universe is very big - there's about 100,000 million galaxies in the universe, so that means an awful lot of stars. And some of them, I'm pretty certain, will have planets where there was life, is life, or maybe will be life. I don't believe we're alone.
Given the millions of billions of Earth-like planets, life elsewhere in the Universe without a doubt, does exist. In the vastness of the Universe we are not alone.
A 'serious' scientist in 1992 or 1993 had to admit the possibility that planets were really rare, that most stars might not have planets. We've gone from there to here - where most stars have planets.
Doing a space walk. It is one of the most rare human experiences. To leave your spaceship and go outside, so that you are alone in the universe with Earth distant and the universe around you. That is amazing.
I don't think that the total creation took place in six days as we now measure time. If we can confirm, say, the Big Bang theory, that doesn't at all cause me to question my faith that God created the Big Bang.
After they had explored all the suns in the universe, and all the planets of all the suns, they realized there was no other life in the universe, and that they were alone. And they were very happy, because then they knew it was up to them to become all the things they had imagined they would find.
When I grew up as a kid, we didn't know there were any other planets outside of our own solar system. It was widely speculated that planet formation was an incredibly rare event and that it's possible that other planets just don't exist in our galaxy, and it's just this special situation where we happen to have planets around our sun.
We're just learning that a lot of planets are small planets, and we didn't know that before, fact is, in planetary science, objects such as Pluto and the other dwarf planets in the Kuiper Belt are considered planets and called planets in everyday discourse in scientific meetings.
Sleeping. Turning in turn like planets rotating in their midnight meadow: a touch is enough to let us know we're not alone in the universe, even in sleep.
Planets are the big bullies of the planetary system that are, that basically ignore everybody else around them. And everybody else has to deal with the planets. Those are what the planets are.
We should get used to the idea that we'll probably never be able to find - and confirm - a good explanation of the ultimate origin of the universe, though I see no reason to believe that we can't press much further on this question than we have managed to date.
The idea that we are alone in the universe seems to me completely implausible and arrogant, considering the number of planets and stars that we know exist, it's extremely unlikely that we are the only form of evolved life.
We know there are billions of stars and planets literally out there, and the universe is getting bigger. We know from our fancy telescopes that just in the last two years more than 20 planets have been identified outside our solar system that seem to be far enough away from their suns - - and dense enough - - that they might be able to support some form of life. So it makes it increasing less likely that we're alone. But if we were visited someday, I wouldn't be surprised.
The question is being asked, 'Are we alone?' And though we now focus on that question we need to think beyond that to what if we're not alone? Then what becomes the next imperative question?
There must be enormous numbers of planets around the stars in the many galaxies in our observable universe. We may be sure that wonderful things are happening on these planets that the human race never will observe.
The universe has told us the most common types of planets are small planets, and our study shows these are exactly the ones that are most likely to be orbiting Alpha Centauri A and B.
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