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NASA Discovers Third New Planet

NASA'S Planet Exploration Satellite TESS Discovers A Third New Planet

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US shutdown delays space missions but NASA not grounded: Report,

NASA’s Transiting Exoplanet Survey Satellite (TESS) has discovered a third small planet outside our solar system, scientists report.

The new planet named HD 21749b, orbits a bright, nearby dwarf star about 53 light years away in the constellation Reticulum. It appears to have the longest orbital period of the three planets so far identified by TESS.

The surface of the new planet is likely around 300 degrees Fahrenheit and is relatively cool, given its proximity to its star, which is almost as bright as the sun, said the team from the Massachusetts Institute of Technology in Boston.

“It’s the coolest small planet that we know of around a star this bright,” said lead researcher Diana Dragomir, a post-doctoral student at the MIT.

HD 21749b journeys around its star in a relatively leisurely 36 days, compared to the two other planets — Pi Mensae b, a “super-Earth” with a 6.3-day orbit, and LHS 3844b, a rocky world that speeds around its star in just 11 hours

The planet is about three times the size of Earth, which puts it in the category of a “sub-Neptune”. Surprisingly, it is also a whopping 23 times as massive as Earth.

But it is unlikely that the planet is rocky and therefore habitable; it’s more likely made of gas, of a kind that is much more dense than the atmospheres of either Neptune or Uranus.

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Representational Image, VOA

“We think this planet wouldn’t be as gaseous as Neptune or Uranus, which are mostly hydrogen and really puffy,” Dragomir said. “The planet likely has a density of water, or a thick atmosphere.”

The researchers have also detected evidence of a second planet, though not yet confirmed, in the same planetary system, with a shorter, 7.8-day orbit. If it is confirmed as a planet, it could be the first Earth-sized planet discovered by TESS.

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The scientists announced the results at the annual American Astronomical Society meeting in Seattle.

Launched in April 2018 for a two-year mission, TESS will survey nearly the entire sky by monitoring and piecing together overlapping slices of the night sky. (IANS)

 

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Scientists Analysing Images Taken by NASA of Vikram Moon Lander

Therefore, it could be difficult to identify right now (and it) may be a little longer before we have another opportunity

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But he added, "It is important to remember that the illumination conditions right now where the lander may be are harsh." Pixabay

Scientists are analysing the images taken under harsh light conditions by the NASA Lunar Reconnaissance Orbiter (LRO) Camera of the area where the Vikram moon lander is likely to have touched down on the moon and it may be a while before they can locate it, project experts told IANS.

LRO project scientist at NASA’s Goddard Space Flight Center, Noah Petro, said on Wednesday that they were now analysing the images taken on Tuesday “and we will make a statement at some point when we can identify the lander.”

But he added, “It is important to remember that the illumination conditions right now where the lander may be are harsh.”

Therefore, it “could be difficult to identify right now (and it) may be a little longer before we have another opportunity to image the landing site next October 14” when the LRO next passes over that area of the moon.

Scientists, Images, NASA
Scientists are analysing the images taken under harsh light conditions by the NASA Lunar Reconnaissance Orbiter (LRO) Camera of the area. Pixabay

The principal investigator for the LRO camera, Mark Robinson of Arizona State University, said that the last image of the area was acquired on Wednesday and will take time to analyse as there are “lots and lots and lots of pixels” to go through.

A NASA statement carried a note of caution saying that when the LRO flew over the Vikram landing the “local lunar time was near dusk; large shadows covered much of the area.”

The LROC “acquired images around the targeted landing site, but the exact location of the lander was not known so the lander may not be in the camera field of view,” NASA said.

“The LROC team will analyze these new images and compare them to previous images to see if the lander is visible (it may be in shadow or outside the imaged area),” it added.

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Vikram lost contact with the Indian Space Research Organisation after it was launched by the Chandraayan 2 moon orbiter to touch down in the area of the moon’s south pole on September 6.

After following the intended trajectory, it deviated in the final moments during the last two kilometres of the descent and went silent.

Vikram carried a rover called Pragyan that was to have conducted experiments on the moon’s surface.

Aviation Week created some confusion on Wednesday with an erroneous headline, “NASA’s LRO fails to spot Chandraayan 2 Lander,” which was picked up by others.

Scientists, Images, NASA
LRO project scientist at NASA’s Goddard Space Flight Center, Noah Petro, said on Wednesday that they were now analysing the images taken on Tuesday “and we will make a statement at some point . Pixabay

Both the scientists IANS spoke to said the headline was wrong.

Robinson said: “They are rather astonishing because we haven’t had the images to look at yet. I don’t know where that came from.”

Petro said, “The headline is wrong. That was actually posted even before we had the data on the ground.”

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The publication later changed the headline to “NASA’s LRO Begins Search For Silent Chandrayaan-2 Lander.” (IANS)