facebook
twitter
rss
account
search
search
 

Distant planets seen in strange alignment

Oct. 3, 2012 at 9:21 PM   |   Comments

TOKYO, Oct. 3 (UPI) -- Two exoplanets have been detected forming a never-seen-before celestial alignment, a phenomenon so new it doesn't yet have a name, Japanese astronomers say.

Teruyuki Hirano of the University of Tokyo and colleagues used data from the Kepler space telescope to probe KOI-94, a star seemingly orbited by four planets, looking for a momentary dimming of the star's light when the planets transited, or passed in front of, the star.

Two planets transiting at the same time would dim the star even more, they said, but if they also overlap there is a momentary increase in brightness as the planets cover less of the star.

This light pattern is exactly what Hirano's team saw as one planet, KOI-94.03, passed in front of the star and then the innermost planet, KOI-94.01, passed between the two.

There has been scientific debate over just what to call this never-before-witnessed occurrence, NewScientist.com reported.

Hirano said he prefers "planet-planet eclipse", but that implies the total covering of one body by another, whereas KOI-94.01 is thought to be larger than KOI-94.03 so parts of all three bodies were visible during the alignment.

Another choice is "double transit", but that can include cases where two planets pass in front of their star but don't overlap.

"Overlapping double transit" is favored by Darin Ragozzine of the Smithsonian Astrophysical Observatory in Cambridge, Mass., who first suggested two years ago a search for the light pattern Hirano's team has now seen.

© 2012 United Press International, Inc. All Rights Reserved. Any reproduction, republication, redistribution and/or modification of any UPI content is expressly prohibited without UPI's prior written consent.
Most Popular
1
Android phones to join iPhone in saying no to the police Android phones to join iPhone in saying no to the police
2
Perth's first iPhone buyer immediately drops brand new phone on live TV Perth's first iPhone buyer immediately drops brand new phone on live TV
3
Dogs are the favorite food of leopards in rural India Dogs are the favorite food of leopards in rural India
4
Only 5 billion years until Andromeda Galaxy eats Milky Way Only 5 billion years until Andromeda Galaxy eats Milky Way
5
Tuna fishermen are not happy about proposed marine sanctuary Tuna fishermen are not happy about proposed marine sanctuary
Trending News
Video
x
Feedback