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

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Michael Watson

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Message 1505628 - Posted: 18 Apr 2014, 15:55:32 UTC

Actually an Earth-sized planet [/i]was discovered around Alpha Centauri. Unfortunately, it is too hot for life as we understand it. Other planets may exist around this star, that would be habitable. If there is one planet around a star there are frequently more, waiting to be discovered.
http://www.space.com/18089-earth-size-alien-planet-alpha-centauri.html
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Message 1506854 - Posted: 21 Apr 2014, 7:56:15 UTC
Last modified: 21 Apr 2014, 8:00:29 UTC

Unfortunately, it is too hot for life as we understand it

Maybe that is where we are going wrong! Perhaps we should be looking where any intelligent life could be, not just where it might be like us. If giant slugs in methane oceans have discovered cures for cancer, we would like to talk to them :-)

You can speculate that slugs, etc. have intelligence, but that won't get you very far. They did not develop it on our planet, due to lack of mobility, etc., and they probably won't on any other. The most likely life forms that we can know of at the moment would probably go through a phase more or less like our own, though how they develop a million years after that is another question.

Hedging ones bets a bit there!
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Message 1507328 - Posted: 22 Apr 2014, 19:31:54 UTC - in response to Message 1505628.  

Actually an Earth-sized planet [/i]was discovered around Alpha Centauri. Unfortunately, it is too hot for life as we understand it. Other planets may exist around this star, that would be habitable. If there is one planet around a star there are frequently more, waiting to be discovered.
http://www.space.com/18089-earth-size-alien-planet-alpha-centauri.html



Alpha Centauri, the nearest by solar system... My uncle was just asking me, if we can't find any bacterial life on Mars, how we can find life so far away? Technology it is...but we can't overrule the laws of nature. I would say unfortunately but it's for the best imho
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Message 1507926 - Posted: 24 Apr 2014, 7:03:45 UTC

Solved: Mysteries of a nearby planetary system

Mysteries of one of the most fascinating nearby planetary systems now have been solved. A new study presents the first viable model for the planetary system orbiting one the first stars discovered to have planets - the star named 55 Cancri. Numerous studies since 2002 had failed to determine a plausible model for the masses and orbits of two giant planets located closer to 55 Cancri than Mercury is to our Sun. Astronomers had struggled to understand how these massive planets orbiting so close to their star could avoid a catastrophe such as one planet being flung into the star, or the two planets colliding with each other.


In order to perform the new analyses, Nelson and Ford collaborated with computer scientists to develop a tool for simulating planetary systems using graphics cards to accelerate the computations.


The 55 Cancri planetary system is just 39 light years away in the constellation Cancer. Because it is so close, by astronomical standards the system shines brightly when viewed from Earth, so astronomers have been able to directly measure the radius of its star -- an observation that is practical only for some of our closest stellar neighbours. Knowing the star's radius made it possible for astronomers to make precise measurements of its mass -- nearly the same mass as our Sun -- as well as the size and density of its super-Earth-size planet.

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Message 1508585 - Posted: 25 Apr 2014, 23:06:26 UTC - in response to Message 1507926.  

NASA's Wide-field Infrared Survey Explorer (WISE) and Spitzer Space Telescope have discovered what appears to be the coldest "brown dwarf" known -- a dim, star-like body that surprisingly is as frosty as Earth's North Pole. Images from the space telescopes also pinpointed the object's distance to 7.2 light-years away, earning it the title for fourth closest system to our sun. The closest system, a trio of stars, is Alpha Centauri, at about 4 light-years away.

http://www.nasa.gov/jpl/wise/spitzer-coldest-brown-dwarf-20140425/index.html#.U1rpxFca3z8
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Message 1508680 - Posted: 26 Apr 2014, 3:19:22 UTC

I wonder if that could be the burned out ember of the star that caused the nebula that our star was born in to collapse more that 4.5 billion years ago?
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Message 1508875 - Posted: 26 Apr 2014, 17:27:22 UTC - in response to Message 1508680.  
Last modified: 26 Apr 2014, 17:27:55 UTC

I wonder if that could be the burned out ember of the star that caused the nebula that our star was born in to collapse more that 4.5 billion years ago?


If it exists, it would be a white dwarf, not a brown dwarf, and most probably it would be very far away by now.
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Message 1508898 - Posted: 26 Apr 2014, 18:51:40 UTC

Wouldn't a white dwarf eventually cool down passing through the brown dwarf state before becoming a dark cold object?
Bob DeWoody

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Message 1509200 - Posted: 27 Apr 2014, 15:21:40 UTC - in response to Message 1508898.  
Last modified: 27 Apr 2014, 15:25:37 UTC

The spectra are different (brown dwarves are mostly hydrogen, white dwarves are mostly carbon and oxygen with a hydrogen-helium atmosphere; white dwarves radiate as a black body, brown dwarves are more like Jupiter). Also, the Universe isn't old enough to have cold white dwarfs. No known white dwarf has a surface temperature below 3900 K (center temperatures are around 10,000,000 K).
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Message 1509327 - Posted: 27 Apr 2014, 23:34:40 UTC - in response to Message 1509200.  

Thanks for the explanation. Way back in 1970 when I was in college this level of knowledge about the nature of stars was nonexistent.
Bob DeWoody

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Message 1515909 - Posted: 14 May 2014, 9:46:07 UTC

Gemini Planet Imager captures best photo ever of an exoplanet

Beta Pictoris b is a gas giant similar in size to Jupiter, though its star is much younger than ours—just 12 million years old. The picture of it was created with an exposure of just one minute, which is a record for an image of an exoplanet—the planet orbits its star just a little closer than does Saturn in our solar system. It was first discovered in 2006 by researchers working with data from the Hubble Space Telescope and verified three years later by researchers at Europe's VLT. Pictures taken at the time suggested that Beta Pictoris b had to regularly plow through space debris of some sort, causing it to appear murky at times.

Beta Pictoris b was chosen as a first test run due to its designation as an easy target. The research team at Gemini South plan to move on to imaging other exoplanets, eventually taking pictures of at least 600 that appear promising. Doing so will help with better understanding orbit times and perhaps help with refining their ages and masses

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Message 1516312 - Posted: 15 May 2014, 1:16:52 UTC - in response to Message 1515909.  

Is this the longest year in the UNIVERSE? Bizarre planet takes 80,000 Earth YEARS to orbit its sun


A gas giant planet has been found in a large orbit around a distant star
Called GU Psc b it takes the planet 80,000 years to complete an orbit
It is 2,000 times further from its star than Earth is from the sun
This distance, a record among exoplanets, has allowed it to be imaged
And it could lead to the discovery of smaller planets in tighter orbits

http://www.dailymail.co.uk/sciencetech/article-2627982/Is-longest-year-UNIVERSE-Bizarre-planet-takes-80-000-Earth-YEARS-orbit-star.html

Does not look like a place to visit.
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Message 1521420 - Posted: 26 May 2014, 22:00:58 UTC

We can't be the only life forms in the universe. I'm still waiting for an ET to land in my backyard.
Live life to the fullest while you can... The ET's may not be friendly when they arrive!!!!
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Message 1521449 - Posted: 27 May 2014, 0:02:37 UTC - in response to Message 1521420.  

We can't be the only life forms in the universe. I'm still waiting for an ET to land in my backyard.



Welcome Phil Jaros to the SETI Forums!

Waiting for ET, priceless :-)
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Message 1521465 - Posted: 27 May 2014, 2:18:28 UTC - in response to Message 1521449.  

Thanks Lynn
Hope to be on more often. :)
Live life to the fullest while you can... The ET's may not be friendly when they arrive!!!!
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Message 1521466 - Posted: 27 May 2014, 2:18:42 UTC - in response to Message 1521420.  

We can't be the only life forms in the universe. I'm still waiting for an ET to land in my backyard.

If it does please send him/her to my house next.
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.
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Message 1523788 - Posted: 2 Jun 2014, 19:07:16 UTC - in response to Message 1521466.  

Astronomers Confounded By Massive Rocky World


Astronomers have discovered a rocky planet that weighs 17 times as much as Earth and is more than twice as large in size. This discovery has planet formation theorists challenged to explain how such a world could have formed.

http://www.nasa.gov/ames/kepler/astronomers-confounded-by-massive-rocky-world/
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Message 1523903 - Posted: 3 Jun 2014, 0:32:15 UTC - in response to Message 1523788.  

Astronomers Confounded By Massive Rocky World

"Just when you think you've got it all figured out, nature gives you a huge surprise – in this case, literally," said Natalie Batalha, Kepler mission scientist at NASA's Ames Research Center in Moffett Field, California. "Isn't science marvelous?"


It appears many shouldn't be explaining the "facts" of the universe.
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Message 1523971 - Posted: 3 Jun 2014, 6:59:19 UTC - in response to Message 1523903.  

It appears many shouldn't be explaining the "facts" of the universe.

You look to be totally clueless of Science and tech.

Are you being just dismissively religious? "It ain't in the 2000-year-old-unchanging-bible and so it can't be true?"

Or just some bored grumpy old troll?


Keep searchin', you might find something...

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Message 1524008 - Posted: 3 Jun 2014, 10:16:55 UTC - in response to Message 1523971.  


You look to be totally clueless of Science and tech.
There is no "science" on this supposed forum. The scientist are too busy doing science to post.
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