(Image Sources: ESO / G. Hüdepohl)
In a paper published on Wednesday, 2016 March 30 in Monthly Notices of the Royal Astronomical Society, two astronomers at Columbia University in New York propose that humanity could use lasers to conceal the Earth from searches by advanced extraterrestrial civilizations.
The new work is in line with suggestions by several prominent scientists, including Stephen Hawking, who have cautioned against humanity’s broadcasting its presence to intelligent life on other planets, lest those civilizations be warlike and desirous of Earth resources.
And it’s in line with an abundance of work over past decades in which earthly astronomers have sought distant planets in our Milky Way galaxy. A primary method for finding these exoplanets is the transit method, which is a high-tech search for a minute dip in starlight when a planet moves directly in front of the star it orbits. Transits are the main way that the Kepler mission and similar projects have discovered some 2,000 planets orbiting distant suns. So far, a few tens of these worlds appear to be similar in size to the Earth.
The suggestion for Earth-cloaking by the Columbia astronomers supposes that other civilizations might also try to find Earth-like planets using the transit method.
More - Link >>> https://earthsky.org/space/use-laser-cloaking-to-hide-earth-from-aliens
Sources: Royal Astronomical Society, EarthSky.org .
2016 April 19.
Related Blog Post ---
"Laser-Propelled Nano-Space Probe to Reach Alpha Centauri in 20 Years?"
2016 April 14.
May 9 - Safe Public Viewing of Rare Astronomical Event
2016: 75th Year of Pittsburgh's Buhl Planetarium Observatory
Link >>> http://spacewatchtower.blogspot.com/2016/01/astronomical-calendar-2016-january.html
Like This Post? - Please Share!
Want to receive SpaceWatchtower blog posts in your inbox ?
Send request to < email@example.com >..
Glenn A. Walsh, Project Director,
Friends of the Zeiss < http://buhlplanetarium.tripod.com/fotz/ >
Electronic Mail - < firstname.lastname@example.org >
SpaceWatchtower Blog: < http://spacewatchtower.blogspot.com/ >
Also see: South Hills Backyard Astronomers Blog: < http://shbastronomers.blogspot.com/ >
Barnestormin: Writing, Essays, Pgh. News, & More: < http://www.barnestormin.blogspot.com/ >
About the SpaceWatchtower Editor / Author: < http://buhlplanetarium2.tripod.com/weblog/spacewatchtower/gaw/ >
SPACE & SCIENCE NEWS, ASTRONOMICAL CALENDAR:
Twitter: < https://twitter.com/spacewatchtower >
Facebook: < http://www.facebook.com/pages/
Author of History Web Sites on the Internet --
* Buhl Planetarium, Pittsburgh:
* Adler Planetarium, Chicago:
* Astronomer, Educator, Optician John A. Brashear:
< http://johnbrashear.tripod.com >
* Andrew Carnegie & Carnegie Libraries:
* Civil War Museum of Andrew Carnegie Free Library:
< http://garespypost.tripod.com >
* cable-car railway, Pittsburgh:
* Public Transit: