OUT OF MIND
Would you like to react to this message? Create an account in a few clicks or log in to continue.
Latest topics
» EUDRA Adverse Reaction Stats Through July 2nd, 2022
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 11:01 am by PurpleSkyz

» Boris Johnson Announces Resignation After Torrent Of Scandals
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 10:58 am by PurpleSkyz

» FDA authorizes pharmacists to prescribe COVID pill
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 10:52 am by PurpleSkyz

» The lights are about to go out in America, warn grid experts
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 10:47 am by PurpleSkyz

» UPDATE: Demolition Crews Level Georgia Guidestones Monument
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 10:45 am by PurpleSkyz

» San Diego Loses 22% Of Its Police Force Due To Vax Mandates
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 10:40 am by PurpleSkyz

» Big Daddy Joe Wired Hunter 95K to Smoke Crack in Deprivation Tank Detox ahahaha
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 10:26 am by PurpleSkyz

» Follow the COVID Money
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 10:20 am by PurpleSkyz

» Dr. Vernon Coleman: THE GREAT BETRAYAL
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 12:30 am by PurpleSkyz

» Pfizer Crimes against our Children: Cardiac Arrest of Two Month Old Baby an Hour after Experimental Vaccine
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 12:16 am by PurpleSkyz

» Robert F. Kennedy, Jr. With Christian Westrook: Manufactured Food Shortages
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 12:13 am by PurpleSkyz

» Georgia Guidestones BAM!
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyToday at 12:07 am by PurpleSkyz

» 74.2 million people in the USA have not had a single dose of a Covid-19 Vaccine
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 10:12 am by PurpleSkyz

» Good People Doing Good Things — Too Many To Count!
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 10:09 am by PurpleSkyz

» Thailand giving away one million cannabis plants to encourage citizens to grow natural medicine
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 10:02 am by PurpleSkyz

» Large Hadron Collider Finds Evidence of 3 Never-Before-Seen Particles plus more
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 9:28 am by PurpleSkyz

» Canada's Health Minister: "You Will Never Be Fully-Vaxxed"
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 9:23 am by PurpleSkyz

» Mexico President Obrador – ‘…Free Assange Or Dismantle Statue Of Liberty”
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 1:19 am by PurpleSkyz

» Pfizer Asks Court to Dismiss Whistleblower Lawsuit Because Government Was Aware of Fraud
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 1:12 am by PurpleSkyz

» LAUSD parents can now file for damages from the illegal COVID vaccine mandates
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 1:09 am by PurpleSkyz

» Cancer-causing Chemicals Leaching into Food from Packaging
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 1:05 am by PurpleSkyz

» Pfizer Ordered by Uruguayan Judge to Report Composition of Covid-19 Vaccines
Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star EmptyYesterday at 1:00 am by PurpleSkyz

You are not connected. Please login or register

OUT OF MIND » SPACE NEWS & DISCLOSURE » SPACE NEWS & UFO DISCLOSURE » Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star

Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star

Go down  Message [Page 1 of 1]

PurpleSkyz

PurpleSkyz
Admin

Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star Rocky-exoplanets-HD-260655_600

Astronomers Have Discovered 2 Super-Earths Orbiting a Nearby Star


MICHELLE STARR  
16 JUNE 2022

Two new worlds of probable rocky mineral goodness have just been found orbiting a star close to our own cosmic neighborhood.
The two newly discovered exoplanets are what are known as super-Earths – bigger than Earth, but smaller than an ice giant – orbiting a cool red dwarf star called HD 260655, which is just 33 light-years away.

While the worlds are unlikely to be habitable, given our current understanding of life, the star and its exoplanets are among the closest multi-world systems to Earth.
This makes it an excellent target for follow-up surveys to try to understand what the exoplanets are made of, and to assess their atmospheres – an endeavor that will aid our search for extraterrestrial life, even if the two worlds turn out to be incapable of hosting it themselves.
"Both planets in this system are each considered among the best targets for atmospheric study because of the brightness of their star," says astronomer Michelle Kunimoto of MIT's Kavli Institute for Astrophysics and Space Research.
"Is there a volatile-rich atmosphere around these planets? And are there signs of water or carbon-based species? These planets are fantastic test beds for those explorations."
To date, more than 5,000 exoplanets have been confirmed in the Milky Way, and astrobiologists are deeply interested in finding terrestrial, or rocky, worlds like Earth, Venus, and Mars.
We have a sample size of exactly one world known to host life – ours – so finding planets similar to Earth in size and composition is one of the top criteria in the search for life elsewhere in the galaxy.

Rocky exoplanets, however, are relatively small in both size and mass, which makes them harder to detect; most of the exoplanets we've been able to measure to date tend to fall into the giant category. Rocky worlds – and better yet, nearby rocky worlds – are highly sought.
The two worlds orbiting HD 260655 – named HD 260655 b and HD 260655 c – were discovered because they pass between us and their star during their orbit. The faint dips in starlight due to these exoplanetary transits were recorded by NASA's exoplanet-hunting telescope TESS, which is designed to detect exactly such phenomena.
When Kunimoto spotted these transit dips in the TESS data, the next step was to look to see if the star had appeared in previous surveys – and it had.
The High Resolution Echelle Spectrometer on the Keck Telescope (now known as ANDES) had publicly available data going back to 1998. Another spectrometer, CARMENES at the Calar Alto Observatory in Spain, also had recorded the star.
This makes a huge difference to exoplanet science: Spectrographic data can reveal whether or not a star is moving on the spot.

"Every planet orbiting a star is going to have a little gravitational pull on its star," Kunimoto says. "What we're looking for is any slight movement of that star that could indicate a planetary-mass object is tugging on it."
Between the TESS data and the data from HIRES and CARMENES, the team was able to confirm that two exoplanets were orbiting HD 260655. Moreover, with both sets of data, the team was able to compile a comprehensive profile of the two exoplanets.
Transit data provides a physical size, based on how much light is blocked from the star; and spectral data reveals how massive the exoplanet is, based on how much the star moves. Both sets of data can be used to calculate the exoplanet's orbit.
The inner exoplanet, HD 260655 b, is around 1.2 times the size of Earth and twice the mass of Earth, and orbits the star every 2.8 days. The outer world, HD 260655 c, is 1.5 times the size and thrice the mass of Earth, and has a 5.7-day orbit.
At those sizes and masses, their densities suggest that the two exoplanets are likely to be rocky worlds.

Sadly, even though the star is cooler and dimmer than the Sun, the proximity of the planets to HD 260655 means the worlds would be way too hot for life as we know it. HD 260655 b has an average temperature of 435 degrees Celsius (816 Fahrenheit), and HD 260655 c is a milder but still scorching 284 degrees Celsius (543 degrees Fahrenheit).
"We consider that range outside the habitable zone, too hot for liquid water to exist on the surface," Kunimoto says.
However, both exoplanets could still have atmospheres, which should be ripe for probing by the newly deployed James Webb Space Telescope, which includes peering at exoplanet atmospheres among its mission objectives.
What's more, there could even be additional exoplanets orbiting the star that we haven't discovered yet.
"There are many multi-planet systems hosting five or six planets, especially around small stars like this one," says astrophysicist Avi Shporer of MIT's Kavli Institute for Astrophysics and Space Research.
"Hopefully we will find more, and one might be in the habitable zone. That's optimistic thinking."
The team presented its findings at the 240th meeting of the American Astronomical Society.

https://www.sciencealert.com/two-super-earth-planets-have-been-found-orbiting-a-star-just-33-light-years-away
Thanks to: https://www.sciencealert.com



  

Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum