Planet Hunters Report Record-Breaking Discovery, Search for other habitable planets

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Message 1612177 - Posted: 11 Dec 2014, 10:01:39 UTC - in response to Message 1611767.  

Again, maybe I didn't write it correctly...

As o many of us go from terrestrial signal TV to cable, most our transmission goes underground...so they (if they are also listening), might not hear us...

Only transmission that we make beyond Earth are the ones we do with our probes...so if "they" pick up anything, it will be that!
Of course they would have to be on the line of the Earth & probe itself... ;)

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Message 1612958 - Posted: 12 Dec 2014, 20:51:34 UTC - in response to Message 1384657.  

Lets see where prioities lay. Any of these "predicted" planets arent even confirmed let alone even having an atmosphere. They are too far away to study let alone see them. We spent how much on finding exo-planets BILLIONS how many planets can be reached in 1,350,000 years travel one way. Mankind could never get there at 64,000.
Now what is in place to stop/change orbit of an earth crossing asteroid , exactly nothing. Amuture astronomers find the bulk of them to all the very large scopes they are a nusence something to foil their images.
Realistically we are too far from other stars and man cant endure more than 300 days in zero G.Our technology is require anothera million years or more before any attempt could feasibly be made.
We will get smacked by an asteroid long before we find life on another world history shows every thousand years we get hit by something big thats assured not that it will happen but when. If you arent looking for them it increases our chances a 100 fold.
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Message 1613027 - Posted: 12 Dec 2014, 22:51:20 UTC - in response to Message 1612958.  

Lets see where prioities lay. Any of these "predicted" planets arent even confirmed let alone even having an atmosphere. They are too far away to study let alone see them. We spent how much on finding exo-planets BILLIONS how many planets can be reached in 1,350,000 years travel one way. Mankind could never get there at 64,000.
Now what is in place to stop/change orbit of an earth crossing asteroid , exactly nothing. Amuture astronomers find the bulk of them to all the very large scopes they are a nusence something to foil their images.
Realistically we are too far from other stars and man cant endure more than 300 days in zero G.Our technology is require anothera million years or more before any attempt could feasibly be made.
We will get smacked by an asteroid long before we find life on another world history shows every thousand years we get hit by something big thats assured not that it will happen but when. If you arent looking for them it increases our chances a 100 fold.



Very clear post, thank you Larry.
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Message 1613518 - Posted: 13 Dec 2014, 20:30:54 UTC

In a 1st, a "super-Earth" has been found by a ground-based telescope.

http://www.news.com.au/technology/science/super-earth-alien-planet-spotted/story-fnjwlcze-1227155326111

But it's unlikely that it's habitable.

Cheers.
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Message 1614305 - Posted: 15 Dec 2014, 19:31:13 UTC - in response to Message 1613518.  

Astronomers find Pluto-sized objects using ALMA

Harvard astronomers have found Pluto-sized objects moving around the sun. According to the published paper, these objects can be closely related with stars too. The discovery was made by using the Atacama Large Millimeter/submillimeter Array (ALMA), a radio telescope setup in Chile.

Interesting.

http://uncovercalifornia.com/content/22663-astronomers-find-pluto-sized-objects-using-alma
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Message 1616018 - Posted: 18 Dec 2014, 23:56:41 UTC - in response to Message 1614305.  

Kepler Spacecraft Finds New Planet

A year and a half after a pointing failure threatened to derail its epochal search for worlds beyond our solar system, NASA’s Kepler spacecraft has bagged another planet, astronomers announced Thursday. The new planet is 20,000 miles in diameter, about two and a half times the size of Earth, and 12 times as massive, putting it into a category of planets called super-Earths that do not exist in our solar system. It is unlivable, circling a star slightly smaller than the Sun about 180 light-years from here in the constellation Pisces at the roasting distance of only 8.4 million miles, less than a tenth of the distance between us and our star.

http://www.nytimes.com/2014/12/19/science/kepler-spacecraft-finds-new-planet.html?_r=0
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Message 1616099 - Posted: 19 Dec 2014, 6:53:02 UTC - in response to Message 1616018.  

Kepler Spacecraft Finds New Planet

A year and a half after a pointing failure threatened to derail its epochal search for worlds beyond our solar system, NASA’s Kepler spacecraft has bagged another planet, astronomers announced Thursday. The new planet is 20,000 miles in diameter, about two and a half times the size of Earth, and 12 times as massive, putting it into a category of planets called super-Earths that do not exist in our solar system. It is unlivable, circling a star slightly smaller than the Sun about 180 light-years from here in the constellation Pisces at the roasting distance of only 8.4 million miles, less than a tenth of the distance between us and our star.

http://www.nytimes.com/2014/12/19/science/kepler-spacecraft-finds-new-planet.html?_r=0

It's ALIVE...Jim, it's ALIVE! ;)

Kepler lives... :D

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Message 1616257 - Posted: 19 Dec 2014, 12:54:59 UTC - in response to Message 1616099.  
Last modified: 19 Dec 2014, 12:56:10 UTC

If we can find a planet of this size at 180 light years ---does that mean that there are no Earth sized planets within, say, 50-100 light years??

It may be that this planet is somewhat large and close to it's sun and therefore may be discernible as it transits across it's star on a frequent basis. So if there are Earth-sized planets within this distance they may be further out from their star and/or not in our line of sight.
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Message 1616262 - Posted: 19 Dec 2014, 13:19:52 UTC

As I understand the method, only planets that transit across the face of a star can be detected. Meaning their orbital plane must be near to edge on relative to earth. Unless there is some bias toward this orientation we may be missing thousands of planetary systems whose orbital plane is canted at angles greater than a few degrees up to 90 degrees
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Message 1616281 - Posted: 19 Dec 2014, 14:37:35 UTC - in response to Message 1616262.  
Last modified: 19 Dec 2014, 15:04:15 UTC

it seems to me that a sphere would always appear as a disc and that crossing it at any angle would be discernible. They also use the wobble effect of a planet on it's star to imply a planet's existence.

Retracted: I see now that we and the planet must be on the same line of sight with the star.
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Message 1616285 - Posted: 19 Dec 2014, 14:54:15 UTC - in response to Message 1616281.  

it seems to me that a sphere would always appear as a disc and that crossing it at any angle would be discernible. They also use the wobble effect of a planet on it's star to imply a planet's existence.

An object orbiting a sphere when viewed from somewhere outside the system will only cross in front of the sphere when the orbital plane is nearly edge on to the observer. When viewed from the perpendicular the object will remain nearly the same distance from the center depending on how circular the orbit is.

The wobble method can determine whether a star has companions but not much else.
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Message 1617315 - Posted: 22 Dec 2014, 10:24:01 UTC

Actually wobble of the star only indicated that it has Jovian type of planet! ;)

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Message 1624056 - Posted: 5 Jan 2015, 23:25:01 UTC - in response to Message 1617315.  

Astronomers write a recipe for other Earths

Twenty years after the first confirmed discovery of an exoplanet -- a planet orbiting a major star, but not our own -- these celestial bodies have really hit their stride. Last year broke records, with astronomers discovering over 800 alien planets in 2014 alone. But now that finding a new exoplanet has become old hat, astronomers are focusing on getting to know these alien worlds intimately, and learning how they form.
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Message 1624119 - Posted: 6 Jan 2015, 0:50:37 UTC - in response to Message 1384789.  

If you take into account that time and space are infinite then extraterrestrial life must exist. As space can never end, we must assume we know nothing about what exist outside of our observations. The problem is that the distances involved will always be a barrier to discovering or exploring alien life. Tony
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Message 1624122 - Posted: 6 Jan 2015, 1:00:20 UTC - in response to Message 1624119.  

If you take into account that time and space are infinite then extraterrestrial life must exist. As space can never end, we must assume we know nothing about what exist outside of our observations. The problem is that the distances involved will always be a barrier to discovering or exploring alien life. Tony

Unfortunately, we are a very conceited species, on the whole. So if we can't see something then it does not exist as far as we are concerned. Whether true or not.
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Message 1624126 - Posted: 6 Jan 2015, 1:14:30 UTC - in response to Message 1624122.  

Welcome Tony to the SETI Forum!
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Message 1624241 - Posted: 6 Jan 2015, 9:25:03 UTC - in response to Message 1624126.  

Welcome Tony to the SETI Forum!


+1:)
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Message 1624512 - Posted: 6 Jan 2015, 22:36:19 UTC - in response to Message 1624241.  

Eight new planets have been discovered in the 'Goldilocks' zone of their stars, orbiting at a distance where oceans and life could exist.


NASA’s Kepler Marks 1,000th Exoplanet Discovery, Uncovers More Small Worlds in Habitable Zones






How many stars like our sun host planets like our Earth? NASA’s Kepler Space Telescope continuously monitored more than 150,000 stars beyond our solar system, and to date has offered scientists an assortment of more than 4,000 candidate planets for further study -- the 1,000th of which was recently verified.

Using Kepler data, scientists reached this millenary milestone after validating that eight more candidates spotted by the planet-hunting telescope are, in fact, planets. The Kepler team also has added another 554 candidates to the roll of potential planets, six of which are near-Earth-size and orbit in the habitable zone of stars similar to our sun.

http://www.nasa.gov/press/2015/january/nasa-s-kepler-marks-1000th-exoplanet-discovery-uncovers-more-small-worlds-in/index.html#.VKxiHHsk5-w
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Message 1625219 - Posted: 8 Jan 2015, 1:12:50 UTC

Have astronomers devised a way to detect planets with orbital periods of a year or more? All of the methods I have read about so far only work when the planet's "year" is from a few days to a couple of months. Telescopes would have to stay trained on a single star for a very long time to catch a blip once every twenty years or so.
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Message 1625308 - Posted: 8 Jan 2015, 6:38:50 UTC - in response to Message 1625219.  

Have astronomers devised a way to detect planets with orbital periods of a year or more? All of the methods I have read about so far only work when the planet's "year" is from a few days to a couple of months. Telescopes would have to stay trained on a single star for a very long time to catch a blip once every twenty years or so.


Nope, here is the link:
http://exoplanets.org/table?datasets=explorer
there are some planets with orbit of 1500+days...
;)

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Message boards : SETI@home Science : Planet Hunters Report Record-Breaking Discovery, Search for other habitable planets


 
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