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re: NASA's making a big exoplanet announcement TODAY, 11AM. Link to Presser in OP
Posted on 7/23/15 at 1:54 pm to Jake88
Posted on 7/23/15 at 1:54 pm to Jake88
A lens doesn't change distance, it just magnifies light. When we see something far away, we see the reflection of light off of it. It takes light 1400 or so years to reflect off of it and hit the lens of our satelite.
4
Posted on 7/23/15 at 1:55 pm to PoppaD
quote:
The telescope looks at a far away star, and sees the shadow of a crossing planet, then they know there is a planet there and how far it is away from that star.
I'm pretty sure it uses wobble and doppler shift, not shadows.
Posted on 7/23/15 at 1:56 pm to Lou Pai
quote:Exactly so what we are seeing now is the equivalent of looking back at the year 615 for us. Relativity is some crazy shite, huh?
A lens doesn't change distance, it just magnifies light. When we see something far away, we see the reflection of light off of it. It takes light 1400 or so years to reflect off of it and hit the lens of our satelite.
Posted on 7/23/15 at 1:57 pm to Lou Pai
I realized that after I posted. I had a dim moment fancifully thinking about seeing past objects and civilizations. I should know better.
Posted on 7/23/15 at 1:58 pm to CptBengal
quote:
I'm pretty sure it uses wobble
Yes, but this helps with large planets more than it does with earth sized ones to my understanding.
quote:
doppler shift,
Not sure how that would help identify the planet, just let us know how quickly the star is moving to us or from us.
This post was edited on 7/23/15 at 2:00 pm
Posted on 7/23/15 at 1:59 pm to CptBengal
quote:
I'm pretty sure it uses wobble and doppler shift, not shadows.
Yep. It detects minute changes in the brightness of a star and based off some science wizardry that I do nut fully understand, they can estimate size, distance from the star and all other sorts of crazy, marvelous things.
LINK
This post was edited on 7/23/15 at 2:00 pm
Posted on 7/23/15 at 2:01 pm to GeauxColonels
SETI needs to beam the shite out of that planet
Posted on 7/23/15 at 2:05 pm to GeauxColonels
quote:The longer the light is blocked out, the bigger the planet.
Yep. It detects minute changes in the brightness of a star and based off some science wizardry that I do nut fully understand, they can estimate size, distance from the star and all other sorts of crazy, marvelous things.
Posted on 7/23/15 at 2:05 pm to GeauxColonels
quote:
Yep. It detects minute changes in the brightness of a star and based off some science wizardry that I do nut fully understand, they can estimate size, distance from the star and all other sorts of crazy, marvelous things.
Not wizardry. Just very very accurate measurements. They get information from a few things, the time of transit, the dip in brightness during transit, the effect it has on the star. When you know the size of the star and the brightness, it's just a matter of punching in X or Y to estimate size and distance.
This post was edited on 7/23/15 at 2:25 pm
Posted on 7/23/15 at 2:07 pm to CptBengal
quote:
When a planet passes in front of a star as viewed from Earth, the event is called a “transit”. On Earth, we can observe an occasional Venus or Mercury transit. These events are seen as a small black dot creeping across the Sun—Venus or Mercury blocks sunlight as the planet moves between the Sun and us. Kepler finds planets by looking for tiny dips in the brightness of a star when a planet crosses in front of it—we say the planet transits the star.
The main instrument looks at the star and if the star dims because a planet passes it it sees it.
The other cool thing about kepler is it is looking in a small area the scientist call local to us in our galaxy and it has found hundreads of planets. If you extrapolate that small area to the whole milky way galaxy that has billions of stars, our galaxy has an unfathomable amount of planets in it.
This post was edited on 7/23/15 at 2:18 pm
Posted on 7/23/15 at 2:15 pm to PoppaD
quote:
If you extrapolate that small area to the whole milky way galaxy that has billions of stars, our galaxy has an unfathomable anount of planets in it.
Yea and that is just our Galaxy..and Pardon my expression, but "It's a big arse sky sir"
Posted on 7/23/15 at 2:19 pm to SidewalkDawg
quote:
Just very very accurate measurements. They get information from a few things, the time of transit, the dip in brightness during transit, the effect it has on the sun. When you know the size of the star and the brightness, it's just a matter of punching in X or Y to estimate size and distance.
Just like I said....science wizardry.
Posted on 7/23/15 at 2:20 pm to LucasP
quote:
how our species finally parishes
Goes to church?
Posted on 7/23/15 at 2:21 pm to Spaceman Spiff
My bad
Posted on 7/23/15 at 2:26 pm to Spaceman Spiff
quote:
how our species finally parishes
quote:
Goes to church?
Nope, they all end up in Louisiana
Posted on 7/23/15 at 2:38 pm to LucasP
quote:
Exactly, we're not moving faster than light so they would actually see 1400 years into our future. They already know who wins the super bowl the next hundred years and maybe even how our species finally parishes.
Not much, if anything, that you have been saying in this thread is even remotely close to being accurate.
Posted on 7/23/15 at 2:40 pm to Lou Pai
quote:
A lens doesn't change distance, it just magnifies light. When we see something far away, we see the reflection of light off of it. It takes light 1400 or so years to reflect off of it and hit the lens of our satelite.
Yes. So what happened again?
Posted on 7/23/15 at 2:44 pm to the_watcher
quote:
Not much, if anything, that you have been saying in this thread is even remotely close to being accurate.
I'm sure some of it is accurate. That's how science works, you just throw shite against the wall and see what sticks. No way to really know if any of it is accurate.
And I'd argue that my middle school blowjob analogy is accurate as shite.
This post was edited on 7/23/15 at 2:47 pm
Posted on 7/23/15 at 2:58 pm to Lou Pai
This is such nonsense. They are making all these assumptions on a planet 1400 light years away and the possibility of life, yada, yada.........
If the Earth were a few degrees either way on it's axis, no life. A little closer to the sun, no life. A little farther, no life. The atmosphere a little thinner or thicker, no life. A few degrees warmer, no life. A few degrees cooler, no life.
They think they can figure out all these variables on something that far way???
NASA is badass, but lets be real here guys.
If the Earth were a few degrees either way on it's axis, no life. A little closer to the sun, no life. A little farther, no life. The atmosphere a little thinner or thicker, no life. A few degrees warmer, no life. A few degrees cooler, no life.
They think they can figure out all these variables on something that far way???
NASA is badass, but lets be real here guys.
Posted on 7/23/15 at 3:08 pm to bamarep
quote:
They think they can figure out all these variables on something that far way???
No, but there are an infinite number of things to look at in space, so we need a way to filter what we spend time looking at and studying.
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