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Scientists to hunt for alien life on Jupiter moons

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European Space Agency

 

London: After a successful mission to Pluto last week, scientists are preparing to launch a probe to search for life on the icy moons of Saturn and Jupiter, media reports said.

Earlier this week, the European Space Agency announced that it would collaborate with aircraft manufacturing giant Airbus to launch a space probe in 2022 to look for extra-terrestrial existence on the four icy moons — Titan, Saturn’s largest moon and the ocean-bearing worlds of Europa, Ganymede and Callisto of Jupiter, the Telegraph newspaper reported on Saturday.

Dubbed as the “Juice” (Jupiter Icy Moons Explorer) spacecraft, the mission will look whether the frozen worlds that surround the two giant gaseous planets could support extra-terrestrial life.

“All our current exciting and fascinating space missions have been dealing with either understanding the origins of life and our Solar System or finding exoplanets (planets that revolve around a star other than the Sun) that might host Earth-like planets,” Daniel Brown, an astronomy expert from Nottingham Trent University, was quoted as saying.

“But, life doesn’t have to exist on planets like Earth, it could also have developed in oceans within icy moons around Jupiter like gas giants,” he added.

It is hoped that micro-organisms or even fish-like creatures may be present in deep-water hydrothermal vents, known as ‘black smokers’, which are known to harbour life on Earth.

“Juice will be exploring the Titan and three Galilean moons of Jupiter thought to harbour oceans under their surface. It will give us a much better understanding what lies beneath the icy crust and how it could offer an environment for life to develop.”

The probe will be launched on an Ariane 5 rocket which would spend seven and a half years slingshotting around Earth, Mars and Venus to pick up enough speed to get to the Jupiter system with as little fuel as possible.

For three and a half years, the spacecraft will sweep around the giant planet, exploring its turbulent atmosphere, enormous magnetosphere, and tenuous set of dark rings, as well as studying the icy moons — Ganymede, Europa, and Callisto.

The probe will start with Callisto before making two fly-bys of Europa, where it will study the icy surface.

 

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NASA’s Kepler Discovers Nearly 100 New Exoplanets

NASA researchers found that some of the signals were caused by multiple star systems or noise from the spacecraft

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UFO religion as a concept is now becoming a part of popular understanding.
Countless galaxies exist in the universe, each hiding secrets that humankind is yet to unearth. Pixabay
  • NASA’s Kepler has discovered nearly 100 new exoplanets
  • Some of the planets discovered are as large as Jupiter
  • NASA has also found planet which orbits very bright stars

An international team of scientists have confirmed the discovery of nearly 100 new exoplanets — planets located outside our solar system.

The discovery was based on data from the second mission of NASA’s Kepler Space Telescope or K2 released in 2014.

NASA has discovered nearly 100 exoplanets. Wikimedia Commons
NASA has discovered nearly 100 exoplanets. Wikimedia Commons

K2 searches for exoplanet transits by registering dips in light caused by the shadow of an exoplanet as it crosses in front of its host star.

NASA researchers found that some of the signals were caused by multiple star systems or noise from the spacecraft.

But they also detected planets that range from sub-Earth-sized to the size of Jupiter and larger.

Also Read: Milky Way’s neighbouring galaxy is of the same size, not bigger

One of the planets detected was orbiting a very bright star.

“We validated a planet on a 10-day orbit around a star called HD 212657, which is now the brightest star found by K2 missions to host a validated planet,” said lead author Andrew Mayo, a doctoral student at the National Space Institute (DTU Space) at the Technical University of Denmark.

Some of the planets found are as big as Jupiter. VOA
Some of the planets found are as big as Jupiter. VOA

For the study, appearing in the Astronomical Journal, the team started out analyzing 275 candidates of which 149 were validated as real exoplanets.

In turn 95 of these planets have proved to be new discoveries, Mayo said.

The Kepler spacecraft was first launched in 2009 to hunt for exoplanets in a single patch of sky, but in 2013 a mechanical failure crippled the telescope.

NASA has found many planets before as well. Wikimedia Commons
NASA has found many planets before as well. Wikimedia Commons

However, astronomers and engineers devised a way to repurpose and save the space telescope by changing its field of view periodically. This solution paved the way for the follow up K2 mission.

Adding the newly discovered exoplanets brings the total number of exoplanets by K2 mission to almost 300, the study said.

Also Read: NASA sounding rocket probing dark regions of space falter

The first planet orbiting a star similar to our own Sun was detected only in 1995. Today some 3,600 exoplanets have been found, ranging from rocky Earth-sized planets to large gas giants like Jupiter. IANS