Showing posts with label Extra-Solar Planet. Show all posts
Showing posts with label Extra-Solar Planet. Show all posts

Friday, April 18, 2025

'Strongest Evidence Yet' of life Discovered On a Distant Planet

'Strongest Evidence Yet' of life Discovered on Distant Planet - www.theufochronicles.com

"Astronomers announced Thursday that they had detected the most promising 'hints' of potential life on a planet beyond our solar system, though other scientists expressed skepticism."


     There has been vigorous debate in scientific circles about whether the planet K2-18b, which is 124 light years away in the Leo constellation, could be an ocean world capable of hosting microbial life, at least.
By CBS News
4-17-2025

Using the James Webb Space Telescope, a British-U.S. team of researchers detected signs of two chemicals in the planet's atmosphere long considered to be "biosignatures" indicating extraterrestrial life.

Tuesday, April 19, 2016

Earth-Like Planet Found in Nearby Star System?

Earth-Like Planet Found in Nearby Star System?

     (Phys.org)—An Earth-like planet may be lurking in a star system located just 16 light years away, according to a new research. The star, named Gliese 832, was recently investigated by a team of astronomers searching for additional exoplanets that may be residing between the two currently known alien worlds in this system. A paper detailing the finding was published online on Apr. 15 in the arXiv journal.
By Tomasz Nowakowski
phys.org
4-19-16

Gliese 832 is a red dwarf and has just under half the mass and radius of our sun. The star is orbited by a giant Jupiter-like exoplanet designated Gliese 832b and by a super-Earth mass planet Gliese 832c. The gas giant, with a mass of 0.64 Jupiter masses, is orbiting the star at a distance of 3.53 AU, while the other planet is potentially a rocky world, around five times more massive than the Earth, residing very close its host star—about 0.16 AU.

Now, a team of astronomers, led by Suman Satyal of the University of Texas at Arlington, has reanalyzed the available data on this nearby planetary system hoping to find more extrasolar worlds that may be located in a vast space between the two known planets. [...]

Thursday, November 12, 2015

Closest Earth-Size Exoplanet Ever Discovered | Video

Closest Earth-Size Exoplanet Ever Discovered

By Calla Cofield
Space.com
11-11-15

     A newly discovered planet 39 light-years away is being called the closest Earth-size exoplanet ever discovered — and a potential "Venus twin" — providing the mouth-watering opportunity for a close-up look at the environment on a rocky alien world.

One of the dire frustrations of studying planets around other stars (and, really, any astronomical object) is their distance from Earth, which makes it onerous or impossible to get many basic details about them. Exoplanets are doubly frustrating because any light they emit (light that would give hints about what's happening on the surface) is often overwhelmed by the light of the parent star.

But the new planet, called GJ 1132b, is only a cosmic stone's throw from Earth, orbiting a fairly dim star, and appears to be a rocky world with an atmosphere. And while its surface temperature indicates that it may have more in common with Venus than Earth, it is so perfectly primed for Earth-based studying, that astrophysicist Drake Deming hailed it as "arguably the most important planet ever found outside the solar system." [...]

Tuesday, August 04, 2015

SETI Targets Kepler-452b in Search for Alien Life

SETI Targets Kepler-452b in Search for Alien Life
An artist's concept of the alien Kepler-452b in orbit around its star Kepler-452, which is located 1,400 light-years from Earth. NASA has billed the potentially habitable planet as Earth's bigger, older cousin.

By Nola Taylor Redd
SPACE.com
7-31-15

      Scientists with the SETI (Search for Extraterrestrial Intelligence) Institute have already begun targeting Earth's "older cousin," Kepler 452b, the first near-Earth-size world found in the habitable zone of a sun-like star.

NASA announced the discovery of Kepler-452b last week, billing the planet as the closest thing yet to an Earth 2.0 beyond Earth's solar system. Researchers have used the Allen Telescope Array, a collection of 42 radio antennas in northern California, to study the planet for radio signals that could indicate the presence of intelligent extraterrestrial life. So far, the antennas haven't tuned into any broadcasts.

"That's no reason to get discouraged," Seth Shostak, senior astronomer with the SETI Institute, which is based in Mountain View, California, said . . ..

Tuesday, July 28, 2015

Scientists Discover 12 New Potential Earth-Like Planets | VIDEO

Scientists Discover 12 New Potential Earth-Like Planets

By Rachel Feltman
The Washington Post
7-23-15

     The latest update from NASA's Kepler space telescope — designed to spot distant exoplanets — adds more than 500 new possible planets to the fray. That's in addition to the 4,175 planets already found by Kepler.

And of those 500 new potential planets, scientists say, a dozen could be remarkably Earth-like. That means they're less than twice as large as Earth, are potentially rocky and are at the right distance from their host stars to harbor liquid water.

Of that dozen, one planet has been confirmed: Kepler 452b, which sits 1,400 light years away from us and orbits a star much like our own — at the same distance as Earth orbits our sun. It has a "better-than-even chance" of being a rocky planet (like Earth), according to statements from Kepler scientists. We can't know for sure what the mass of Kepler 452b is, but models suggest that it might be as much as five times as massive as Earth, with gravity twice as strong. A rocky planet that massive would likely have volcanic activity. . . .

Friday, July 24, 2015

New Planet Discovery in 'Habitable Zone' – Older Cousin to Earth

New Planet Discovery in 'Habitable Zone' – Older Cousin to Earth

By NASA
7-23-15

    NASA's Kepler mission has confirmed the first near-Earth-size planet in the “habitable zone” around a sun-like star. This discovery and the introduction of 11 other new small habitable zone candidate planets mark another milestone in the journey to finding another “Earth.”

The newly discovered Kepler-452b is the smallest planet to date discovered orbiting in the habitable zone -- the area around a star where liquid water could pool on the surface of an orbiting planet -- of a G2-type star, like our sun. The confirmation of Kepler-452b brings the total number of confirmed planets to 1,030.

"On the 20th anniversary year of the discovery that proved other suns host planets, the Kepler exoplanet explorer has discovered a planet and star which most closely resemble the Earth and our Sun," said John Grunsfeld, associate administrator of NASA’s Science Mission Directorate at the agency’s headquarters in Washington. “This exciting result brings us one step closer to finding an Earth 2.0."

Kepler-452b is 60 percent larger in diameter than Earth and is considered a super-Earth-size planet. While its mass and composition are not yet determined, previous research suggests that planets the size of Kepler-452b have a good chance of being rocky.

While Kepler-452b is larger than Earth, its 385-day orbit is only 5 percent longer. The planet is 5 percent farther from its parent star Kepler-452 than Earth is from the Sun. Kepler-452 is 6 billion years old, 1.5 billion years older than our sun, has the same temperature, and is 20 percent brighter and has a diameter 10 percent larger.

“We can think of Kepler-452b as an older, bigger cousin to Earth, providing an opportunity to understand and reflect upon Earth’s evolving environment," said Jon Jenkins, Kepler data analysis lead at NASA's Ames Research Center in Moffett Field, California, who led the team that discovered Kepler-452b. "It’s awe-inspiring to consider that this planet has spent 6 billion years in the habitable zone of its star; longer than Earth. That’s substantial opportunity for life to arise, should all the necessary ingredients and conditions for life exist on this planet.”

To help confirm the finding and better determine the properties of the Kepler-452 system, the team conducted ground-based observations at the University of Texas at Austin's McDonald Observatory, the Fred Lawrence Whipple Observatory on Mt. Hopkins, Arizona, and the W. M. Keck Observatory atop Mauna Kea in Hawaii. These measurements were key for the researchers to confirm the planetary nature of Kepler-452b, to refine the size and brightness of its host star and to better pin down the size of the planet and its orbit.

The Kepler-452 system is located 1,400 light-years away in the constellation Cygnus. The research paper reporting this finding has been accepted for publication in The Astronomical Journal.

In addition to confirming Kepler-452b, the Kepler team has increased the number of new exoplanet candidates by 521 from their analysis of observations conducted from May 2009 to May 2013, raising the number of planet candidates detected by the Kepler mission to 4,696. Candidates require follow-up observations and analysis to verify they are actual planets.

Twelve of the new planet candidates have diameters between one to two times that of Earth, and orbit in their star's habitable zone. Of these, nine orbit stars that are similar to our sun in size and temperature.

“We've been able to fully automate our process of identifying planet candidates, which means we can finally assess every transit signal in the entire Kepler dataset quickly and uniformly,” said Jeff Coughlin, Kepler scientist at the SETI Institute in Mountain View, California, who led the analysis of a new candidate catalog. “This gives astronomers a statistically sound population of planet candidates to accurately determine the number of small, possibly rocky planets like Earth in our Milky Way galaxy.”

These findings, presented in the seventh Kepler Candidate Catalog, will be submitted for publication in the Astrophysical Journal. These findings are derived from data publicly available on the NASA Exoplanet Archive.

Scientists now are producing the last catalog based on the original Kepler mission’s four-year data set. The final analysis will be conducted using sophisticated software that is increasingly sensitive to the tiny telltale signatures of Earth-size planets.

Ames manages the Kepler and K2 missions for NASA’s Science Mission Directorate. NASA's Jet Propulsion Laboratory in Pasadena, California, managed Kepler mission development. Ball Aerospace & Technologies Corporation operates the flight system with support from the Laboratory for Atmospheric and Space Physics at the University of Colorado in Boulder. . . .

Sunday, January 13, 2013

Amateur Astronomers Discover 42 Alien Planets | SPACE NEWS

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Amateur astronomers discover 42 alien planets

By Elizabeth Howell
www.space.com
1-11-13

      A team of amateurs has discovered evidence for 42 alien planets, including a Jupiter-size world that could potentially be habitable, by sifting through data from a NASA spacecraft.

Forty volunteers with the crowd-sourcing Planet Hunters project discovered the new planet candidates, which include 15 potentially habitable worlds and PH2 b, a Jupiter-size planet that the team confirmed to be in the habitable zone of its parent star.

This is the second time Planet Hunters project, which is overseen by Zooniverse, has confirmed a new exoplanet discovery. What's more, several candidate planets found by the project may be in the habitable zones of their parent stars. These candidates are awaiting confirmation by professional astronomers. . . .

Sunday, January 15, 2012

VIDEO | ScienceCasts: Re-thinking an Alien World


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Re-thinking an Alien World





See Also:

NASA Telescope Confirms Alien Planet in So-called 'Goldilocks Zone'

First Direct Photo of Alien Planet Finally Confirmed

Tally of Confirmed Alien Planets Surpasses 700


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Thursday, December 22, 2011

Newly Found Planets are 'Roasted Remains'


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By Jonathan Amos
BBC News
21-21-11
Just a day after announcing the discovery of the first Earth-size planets ever detected outside our Solar System, scientists have confirmed the existence of two even smaller worlds.

     There is something very unusual about these objects, however.

It appears they are the roasted remains of planets that spent a period of time inside the outer layers of their star.

Scientists tell Nature magazine that these worlds are therefore likely to have been much bigger in the past.

Once again, these worlds were identified using data from Nasa's Kepler telescope, which was put in orbit in 2009 with the specific goal of hunting down small planets. . . .

Monday, November 21, 2011

Tally of Confirmed Alien Planets Surpasses 700

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By Mike wall
SPACE.com
11-21-11
     Less than 20 years after discovering the first world beyond our solar system, astronomers have bagged alien planet number 700.

As of Nov. 18, the tally stands at 702 exoplanets, according to the Extrasolar Planets Encyclopedia, a database compiled by astrobiologist Jean Schneider of the Paris-Meudon Observatory.

Schneider's list is one of two main alien-world trackers out there. The other is called "PlanetQuest: New Worlds Atlas," run by NASA's Jet Propulsion Laboratory. PlanetQuest's current count stands at 687; the difference between the two databases highlights the uncertainties involved in exoplanet detection and confirmation.

Regardless, both tallies have been growing quickly lately. And both will add hundreds, or perhaps thousands, of new alien planets in the near future.

Sunday, January 06, 2008

Baby Planet Spotted Near Faraway Sun

Baby Planet Near Farawy Sun
By Jeanna Bryner
space.com
1-2-08

     Astronomers say they have discovered the youngest planet to date circling a sunlike star, a find that will be a boon to the field of planet-formation theory.

The extrasolar planet is an estimated 8 million to 10 million years old, a mere toddler compared to Earth, which is 4.5 billion years old. Until now, the researchers say, no planet younger than 100 million years old has been detected circling a sunlike star.

"It means we're opening up a new field of trying to find planets around very young stars," said Alan Boss, a planet-formation theorist at the Carnegie Institution of Washington. "So it's the very first example, and we hope there will be a lot more." Boss was not involved in the discovery.

The newly found world is so infantile that it resides in the star's "protoplanetary disk," a ring of gas and dust circling the star. It has been cataloged as TW Hydrae b.

"This demonstrates that planets can form within 10 million years, before the disk has been dissipated by stellar winds and radiation," the researchers write in Thursday's issue of the journal Nature.

Weighing in at nearly 10 Jupiter masses, the planet circles at a distance of 0.04 Astronomical Units from its host star, TW Hydrae, in the constellation Hydra. One AU is the average distance between Earth and sun.

The gassy "hot Jupiter" takes 3.56 days to orbit its star. The host star is located 180 light-years away from Earth.

Planets are thought to form within disks of dust and gas around newly born stars. Catching a planet in its childhood can give astronomers lots of information about how planets materialize.

"The discovery shows that what we always call as 'protoplanetary' disks are indeed protoplanetary; they form planets," study researcher Johny Setiawan of the Max-Planck Institute for Astronomy in Germany told Space.com. "There are many 'protoplanetary' disks detected around young stars, but no planets so far have been detected within such young systems."

Around some young star systems, however, astronomers have found signs of planets by noting clear lanes of dust within the disks. In these cases, it's presumed that young planets are forming and have scooped up the dust, but the planets themselves have not been detected.

Setiawan and colleagues discovered their new world by measuring a wobble in the host star due to the gravitational tug from the orbiting planet. This so-called radial-velocity method is great at detecting extrasolar planets, but it also can produce false positives — suggesting a planet is there when in fact the data owe to some other object or phenomenon.

That's particularly true in young star systems. For one, nascent stars are incredibly active, and their changing outer atmospheres can at the very least make for background noise. In addition, if the star rotates about its axis, that can be problematic.

"There are lots of other things going on in these young stars that could give you a false positive, where you think you're seeing a planet but you're actually seeing some other stellar activity," Boss said in a telephone interview.

Boss thinks the discoverers ruled out these non-planet signals. "They've done a good job of trying to address those worries," he said.

Thursday, August 09, 2007

Do Extra-Solar Planets Really Exist?

Exoplanet

By Frank Warren
The UFO Chronicles
© 8-9-07


     For centuries the faith instilled in men of so-called science has weighed heavily on those who’ve looked towards the stars in regards to the existence of extra-solar planets. The cognition of heavenly bodies within our own solar system precipitated the belief there also exists what we call planets outside our solar neighborhood.

Ironically, at present just exactly what a planet is has come under scrutiny. The International Astronomers Union (IAU) is recognized as the world body in regards to resolving such matters; they state that the definition of a planet is “a body that orbits the Sun, it is large enough for its own gravity to make it round, and has 'cleared its neighborhood' of smaller objects.”

Paradoxically, by this definition alone there can be no extra-solar planets! This of course changes our astronomical history as Pluto does not fall under this definition.

Noteworthy allegations of exoplanets began in the 19th century; in 1855 Capt. W. S. Jacob of the Madras Observatory observed a binary star system, 70 Ophiuchi, to which he claimed it's orbit showed an anomaly, and it was "highly probable" that there was a planetary body in connection with this system. Moreover decade’s later, other prominent astronomers concurred with Jacob.

One hundred years later similar claims were made in regards to Barnard’s Star; today, current contemporaries have laid most of these allegations to the wayside.

At present exoplanet believers state that they have proof of the existence of over 200 extra-solar Jupiter sized planets; however, as Carl Sagan said, “extraordinary claims require extraordinary evidence!”

In addition, akin to what skeptic Dr. Michael Shermer has pointed out in regards to other alleged phenomenon, “science is open to that, but just being open to it and what we would like to be true, does not make it true.”

It’s important to note that exoplanet believers have no direct evidence for their claims, save one—a blurry picture of an alleged planet. Given today’s computer technology e.g., Photoshop etc., one has to wonder about the origins of the photograph. Perhaps the European astronomers who first made the claim and presented the image were looking for notoriety, and or monetary rewards.

Even if the photograph of the distant light is genuine, other exoplanet believers are hesitant to jump on board! Its been pointed out that the distant light (or alleged exoplanet) "can’t be confirmed in having a gravitational connection to what’s thought to be it’s host star.”

What that leaves is circumstantial allusions in support of the exoplanet believer’s theorems. The bulk of the exoplanets which are alleged to be in existence by believers have not been seen by anyone, or photographed (excepting the a fore mentioned “blurry photograph” of a distant light); they haven’t been traveled to, or physically investigated in any way; there is absolutely no physical evidence. Additionally, there isn’t anecdotal, eyewitness and or documental evidence of any past proof of the existence of exoplanets.

What believers are left with for the most part is a detection method for a star’s wobble, wherein the conjecture is made by believers that an exoplanet’s gravity is causing a slight pull on it’s host star. This method is called Doppler Spectroscopy—the observation of Doppler shifts in the spectrum of the star around which the planet orbits.

From the onset of this methodology, as well as the believer’s first claim of the existence of exoplanets—there has been controversy within their own camp.

One of the early stars purported to host an exoplanet was 51 Peg; Dr. David Gray (Univ. Western Ontario) published a paper back in '97 suggesting that some undulations or oscillations of the star, are responsible for the Doppler shifts, rather than an orbiting planet—this polarized the astronomical community, and although Gray’s position may be overlooked today, it hasn’t been rebutted in any definitive manner; henceforth the exoplanet believer’s methodology is arguably flawed.

Admittedly, there are other indirect schemes in regards to the stars which believers imagine may host exoplanets; however, these are also indirect contrivances.

In the end like Seth Shostak of SETI says, “The burden of proof is on those making the claims, not those who find the data dubious.” Finally, Michael Shermer concurs: [regarding science] “the default assumption is that whatever the claim is, it's not true until it's proved. So the burden of proof is on the person making the claim.”