‘Superhubble’ could discover 1,400 new planets: NASA telescope due to launch by 2025 can better spot worlds outside our solar system thanks to a quirk of physics discovered by Einstein
- A new deep-space telescope could find 1,400 planets outside our solar system
- It will be able to map galaxies 100 times faster than the Hubble Space Telescope
- It will find hundreds of new galaxies compared to the ‘few’ that Hubble found
- A mission to take the telescope into space will cost Nasa £2.45 billion ($3.25 bn)
NASA’s next ‘flagship mission’ into space could find as many as 1,400 new planets using a telescope 100 times more powerful than the Hubble Space Telescope.
The mission is costing the space agency £2.45 billion ($3.25 bn) and will deploy a (WFIRST) that can produce the clearest image of the Universe to date.
The mission will continue the work of its predecessor telescope the Kepler, that found more than 2,600 planets outside our solar system before its mission ended last October.
Nasa is planning a new telescope 100 times bigger than Hubble. Dubbed WFIRST (Wide Field Infrared Survey Telescope), the ‘Supperhubble’ will investigate dark energy, exoplanets and galaxy formation. It is due to fly in mid-2020
The mission is currently still at planning stage but is still scheduled to launch in mid 2020, says Nasa.
The main goals of the mission are: to study dark energy, to study exoplanets, and to enable a guest observer program.
Nasa said: ‘Where Hubble has found only a few galaxies within 500 million years of the Big Bang, we now know from Hubble that WFIRST will find hundreds of these rare objects.’
The WFIRST’s ‘gravitational microlensing’ – a technique using Albert Einstein’s famous theory of general relativity – could allow it find up to 1,400 new planets outside our Solar System.
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Lead study author Dr Matthew Penny, postdoctoral researcher in the Ohio State Department of Astronomy, said: ‘We want to know what kind of planetary systems there are.
‘To do that, you need to not just look where the obvious, easy things are. You need to look at everything.
‘Kepler began the search by looking for planets that orbit their stars closer than the Earth is to our Sun.
‘WFIRST will complete it by finding planets with larger orbits.
‘Although it’s a small fraction of the sky, it’s huge compared to what other space telescopes can do.
‘It’s WFIRST’s unique combination – both a wide field of view and a high resolution – that make it so powerful for microlensing planet searches. Previous space telescopes, including Hubble and James Webb, have had to choose one or the other.
‘WFIRST will allow us to find types of planets that we haven’t seen before now.
‘From WFIRST’s microlensing survey, we will learn how frequently different types of planets are formed, and how unique our solar system is.’
He said the new telescope will pave the way for a more accurate, more focused search for extraterrestrial life.
The Wide Field Infrared Survey Telescope (WFIRST) probe uses an old spy telescope that has a field of view 200 times wider than Hubble (pictured). Single images captured by the new 2.4 will be able to uncover millions of galaxies, says Nasa
It was designed by NASA and astronomers to find new planets and research dark energy – the mysterious force thought to be powering the Universe’s increasing rate of expansion since the Big Bang.
The study provides the most detailed estimates of its potential reach to date.
It explained the gravitational microlensing technique relied on the gravity of stars and planets to bend and magnify the light coming from stars that pass behind them from the telescope’s viewpoint.
This effect, which is connected to Albert Einstein’s Theory of Relativity, allows a telescope to find planets orbiting stars thousands of light-years away from Earth -much farther than other planet-detecting techniques.
But because it only works when the gravity of a planet or star bends the light from another star, the effect from any given planet or star is only visible for a few hours once every few million years.
WFIRST will spend long stretches of time continuously monitoring 100 million stars at the centre of the galaxy, as a result.
A map of the night sky charting showing hundreds of thousands of galaxies. According to Nasa, where Hubble has found only a few galaxies within 500 million years of the Big Bang, WFIRST will be able to find hundreds of these
Dr Penny said it should give astronomers, astrophysicists and others who study space significantly more information about more planets outside of our solar system.
So far, scientists have discovered about almost 700 planetary systems–also known as solar systems–containing more than one planet.
And they have discovered some 4,000 planets. But even though humans have searched galaxies near and far for signs of life, the search mostly has found planets that are closer to their stars than Earth is to our Sun.
His study predicted that about 100 of those not-yet-discovered planets by WFIRST could have the same or lower mass as Earth.
The new telescope will be able to map the Milky Way and other galaxies 100 times faster than the famous Hubble Space Telescope, which was launched in 1990.
The WFIRST mission will scan a small piece of the universe at a resolution higher than any similar mission in the past.
Dr Penny said that resolution will allow WFIRST to see more stars and planets than any previous organised search.
The ‘infrared’ piece of the Wide Field Infrared Survey Telescope is also important, he added.
Dr Penny said: ‘Infrared light allows WFIRST to see through dust that lies in the plane of the Milky Way in between us and the galactic center, something optical telescopes on the ground cannot do.
‘This gives WFIRST access to parts of the sky that are more densely packed with stars.’
The mission is still in the planning stages; NASA announced plans to move forward with WFIRST in February of 2016, and began its initial planning in May of 2018.
The study was published in the Astrophysical Journal Supplement Series.
WHAT IS THE BIG BANG THEORY?
The Big Bang Theory is a cosmological model, a theory used to describe the beginning and the evolution of our universe.
It says that the universe was in a very hot and dense state before it started to expand 13,7 billion years ago.
This theory is based on fundamental observations.
In 1920, Hubble observed that the distance between galaxies was increasing everywhere in the universe.
The Big Bang Theory is a cosmological model, a theory used to describe the beginning and the evolution of our universe, based on observations – including the cosmic background radiation (pictured), which is a like a fossil of radiation emitted during the beginning of the universe, when it was hot and dense
This means that galaxies had to be closer to each other in the past.
In 1964, Wilson and Penzias discovered the cosmic background radiation, which is a like a fossil of radiation emitted during the beginning of the universe, when it was hot and dense.
The cosmic background radiation is observable everywhere in the universe.
The composition of the universe – that is, the the number of atoms of different elements – is consistent with the Big Bang Theory.
So far, this theory is the only one that can explain why we observe an abundance of primordial elements in the universe.
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