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Are we alone in the Universe or there is Alien life? Astronomers spot nearby Star with seven Earth-size Planets

astronomers have spotted a nearby star with seven Earth-size planets which could harbour liquid water, key to life as we know it, NASA said.

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What will happen to exploration missions if NASA runs out of fuel? Wikimedia

Washington, Feb 23, 2017: In a remarkable step towards answering the question “Are we alone in the universe”, astronomers have spotted a nearby star with seven Earth-size planets which could harbour liquid water, key to life as we know it, NASA said.

At about 40 light-years (235 trillion miles) from Earth, the system of planets is relatively close to us, in the constellation Aquarius.

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All of these seven planets could have liquid water under the right atmospheric conditions, but the chances are highest with three of the plants which are located in the habitable zone, according to the researchers.

“This discovery could be a significant piece in the puzzle of finding habitable environments, places that are conducive to life,” said Thomas Zurbuchen, Associate Administrator of NASA’s Science Mission Directorate in Washington.

Because they are located outside of our solar system, these planets are scientifically known as exoplanets.

This exoplanet system is called TRAPPIST-1, named for The Transiting Planets and Planetesimals Small Telescope (TRAPPIST) in Chile.

“The seven wonders of TRAPPIST-1 are the first Earth-size planets that have been found orbiting this kind of star,” said Michael Gillon, lead author of the paper and the principal investigator of the TRAPPIST exoplanet survey at the University of Liege, Belgium.

“It is also the best target yet for studying the atmospheres of potentially habitable, Earth-size worlds,” Gillon said.

In May 2016, researchers using TRAPPIST announced they had discovered three planets in the system.

Assisted by several ground-based telescopes, including the European Southern Observatory’s Very Large Telescope, NASA’s Spitzer space telescope confirmed the existence of two of these planets and discovered five additional ones, increasing the number of known planets in the system to seven.

Using Spitzer data, the team precisely measured the sizes of the seven planets and developed first estimates of the masses of six of them, allowing their density to be estimated.

Based on their densities, all of the TRAPPIST-1 planets are likely to be rocky, according to the new results published on Wednesday in the journal Nature

Further observations will not only help determine whether they are rich in water, but also possibly reveal whether any could have liquid water on their surface.

The mass of the seventh and farthest exoplanet has not yet been estimated. But scientists believe it could be an icy, “snowball-like” world, but further observations are needed.

The discovery of the seven exoplanets sets a new record for greatest number of habitable-zone planets found around a single star outside our solar system.

In contrast to our sun, the TRAPPIST-1 star — classified as an ultra-cool dwarf — is so cool that liquid water could survive on planets orbiting very close to it, closer than is possible on planets in our solar system.

All seven of the TRAPPIST-1 planetary orbits are closer to their host star than Mercury is to our sun.

The planets also are very close to each other. If a person was standing on one of the planet’s surface, they could gaze up and potentially see geological features or clouds of neighbouring worlds, which would sometimes appear larger than the moon in the Earth’s sky, NASA said. (IANS)

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NASA Receives Over 12K Applications By Candidates For Joining its Next Class of Artemis Generation Astronauts

The next class of Artemis Generation astronauts will help us explore more of the Moon than ever before and lead us to the Red Plane

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NASA expects to introduce the new astronaut candidates in the summer of 2021. Pixabay

NASA has received over 12,000 applications from people showing willingness to join its next class of Artemis Generation astronauts who will help the US space agency explore the Moon and Mars like never before.

The application for the newest class of astronauts opened March 2 and closed March 31, NASA said on Wednesday, adding that applications were received from every US state, the District of Columbia, and four US territories. “We’ve entered a bold new era of space exploration with the Artemis programme, and we are thrilled to see so many incredible Americans apply to join us,” NASA Administrator Jim Bridenstine said in a statement.

“The next class of Artemis Generation astronauts will help us explore more of the Moon than ever before and lead us to the Red Planet,” Bridenstine added. However, the process is just beginning for NASA’s Astronaut Selection Board, which will assess the applicants’ qualifications and invite the most qualified candidates to the agency’s Johnson Space Center in Houston for interviews and medical tests before making a final selection.

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NASA expects to introduce the new astronaut candidates in the summer of 2021. Once selected, the astronaut candidates will go through approximately two years of initial skills training, such as spacewalking, robotics, and spacecraft systems, as well as expeditionary behavior skills, such as leadership, followership, and teamwork.

After completing training, the new astronauts could launch on American rockets and spacecraft — developed for NASA’s Commercial Crew Program — to live and work aboard the International Space Station, 250 miles above Earth. There they will take part in experiments that benefit life at home and prepare NASA for the Moon and Mars.

This new class also may launch aboard NASA’s powerful new Space Launch System rocket and Orion spacecraft for Artemis missions to the Moon. Beginning in 2024, NASA will send the first woman and next man to the lunar surface and will establish sustainable lunar exploration by 2028. Gaining insights from new experiences on and around the Moon will prepare NASA to send the first humans to Mars in the 2030s.

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NASA has received over 12,000 applications from people showing willingness to join its next class of Artemis Generation astronauts who will help the US space agency explore the Moon and Mars like never before. Pixabay

The number of people who applied to be an astronaut represents the second-highest number of applications NASA has ever received, surpassed only by the record of 18,300 set by the most recent class of astronauts who graduated in January. For this round of applications, NASA increased the education requirement for applicants from a bachelor’s degree to a master’s degree in a science, technology, math, or engineering field.

In addition, the application period was shortened from two months to one. Since the 1960s, NASA has selected 350 people to train as astronaut candidates for its increasingly challenging missions to explore space.

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With 48 astronauts in the active astronaut corps, more will be needed to serve as crew aboard spacecraft bound for multiple destinations and propel exploration forward as part of Artemis missions and beyond. (IANS)