Alien-hunting telescope `Colossus` to be ready in 5 yrs
New York: Astronomers are planning a massive 250-foot telescope that will search for extraterrestrial life by detecting the heat that alien civilisations may produce.
The proposed instrument called Colossus would measure 77 metres which is more than double the aperture of any telescope yet constructed. It is expected to cost USD 1 billion.
The telescope would be sensitive enough to spot cities or other signs of aliens for planets as far as 60 to 70 light-years from Earth, astronomers said.
"If we had an investor come and say `look, here are the resources you need`, we could have the telescope built within five years," said Jeff Kuhn, an astronomer at the University of Hawaii`s Institute for Astronomy, who is on the proposal team.
In searches for extraterrestrial intelligence, astronomers generally focus on seeking out beamed signals from other civilisations. In four decades of searching, nothing definitive has been found.
There are limitations with this method, however. Perhaps the aliens might not send out signals themselves. Perhaps they broadcast in channels humans wouldn`t think of using.
Moreover, humans should perhaps be cautious about sending out signals and alerting more advanced civilisations to their presence, as physicist Stephen Hawking has said.
This is where Colossus can shine, Kuhn said. The telescope is a passive receiver that allows astronomers to seek out extraterrestrials without alerting them to the search.
Kuhn`s team builds on a concept first proposed by physicist Freeman Dyson in the 1960s. Humans can capture only a fraction of the energy sent out by the Sun, but a more advanced civilisation would want to grab as much as possible.
Dyson suggested an extraterrestrial civilisation would surround their star with a structure - now known as a "Dyson sphere" - that would capture the energy needed and then bleed the rest off into space.
From Earth, a star that is faint optically but very strong in the infrared could be an indication of such a sphere, Dyson mused.
Kuhn`s team, rather than focusing on stars, is instead looking at the surfaces of alien planets.
"Similarly, an exoplanet that was optically dark, but thermally bright, would be evidence of extraterrestrial civilisation," Kuhn said.
"The biggest telescopes that we`re likely to see in the next 100 years or so will not be able to directly image cities or organised structures on the planet," he said. Still, he added, local heat sources could be visible.
There`s no firm location yet for the telescope, but Kuhn suggested it could be built in the San Pedro Martir mountainous area of Baja California in Mexico, close to the location of one partner in the project: the National University of Mexico in Ensenada.
More from India
More from World
More from Sports
More from Entertaiment
- Will Akhilesh-Rahul alliance be able to trump BJP in UP elections?
- Arms case: Salman Khan acquitted by Jodhpur court
- Raisina Dialogue 2017: Pakistan must walk away from terror, says PM Modi
- J&K: LeT militant gunned down by security forces in Bandipora
- Etah: School bus collides with truck, several children killed
- World's 30 most dynamic cities: Check out the full list
- China State TV said that its troops can reach New Delhi in 48 hours in war scenario; Indians slay it with their replies
- WATCH: Kieron Pollard's incredible one-handed six demoralises Fawad Ahmed
- IND vs ENG, 2nd ODI: Yuvraj Singh silences critics with 14th ODI hundred, fourth against England — WATCH
- Bengaluru pips Silicon Valley to become world's most dynamic city