Scientists find TRAPPIST-1 to be aged between 5.4 & 9.8 billion years

Scientists find TRAPPIST-1 to be aged between 5.4 & 9.8 billion years

Now the new arrow estimation of scientists has raised new questions on the orbit immovability of the seven planets circling this new star system as well as its potentiality to host life.

"There's many earth size planets orbiting, probably most of the stars in the galaxy", said Burgasser.

At the time of its discovery earlier this year, scientists believed the TRAPPIST-1 system had to be at least 500 million-years-old. "This enabled us to essentially verify the existence of the two outer, potentially habitable planets in the system", University of Hertfordshire astronomer and co-author Mikko Tuomi explained.

The habitable zone, however, doesn't guarantee habitability, it simply defines a range of orbital distances at which water could in theory exist as a liquid.

TRAPPIST-1 is an ultracool dwarf star, not a yellow dwarf star like the Sun.

Since Tau Ceti is only 12 light-years away, the four planets are reportedly visible to the naked eye, even if they are some of the smallest planets ever found orbiting nearby sun-like stars. Because they're so close, it's possible that the equivalent of an ocean has evaporated from each TRAPPIST-1 planet, except for the two farthest from the star.

NASA said it's "unclear" what TRAPPIST-1's old age means for the planets' habitability.

Additionally, the planets are tidally locked.

Much has been said about the "ultra-cool dwarf star" that is hosting the planetary system, but the noise around it had sort of faded - until now. There is no day-night cycle on the planets in the TRAPPIST-1 system, one side experience a perpetual day, the other a never ending night, with a constant twilight zone between the two regions.

"If there is life on these planets, I would speculate that it has to be hardy life, because it has to be able to survive some potentially dire scenarios for billions of years", Burgasser said. Our own solar system was formed some 4.5 billion years ago. NASA researchers have now found out that the TRAPPIST-1 system is older than the solar system. All three factors suggest the system is significantly older than our solar system.

However, the planets in the TRAPPIST-1 system are of a lower density than Earth, which could mean that they could have a dense atmosphere with a lot of water vapour content, which would act as effective shields against the stellar radiation.

"This means the planets had to evolve together, otherwise the system would have fallen apart long ago", said Burgasser, first author of the research published in The Astrophysical Journal.



Related Posts

Charter Communications, Inc. (CHTR) Rating Increased to Strong-Buy at BidaskClub
BidaskClub upgraded Charter Communications from a "buy" rating to a "strong-buy" rating in a report on Tuesday, August 1st. This target is based on CHTR trading at 10X'18 EBITDA (adding back NPV of NOL) and 20X '18 FCF vs. 9.4X and 18X now .

HBO offered 'bounty' to hackers
(Web Desk) - HBO reportedly has offered $250,000 to the group that hacked its servers under the guise of a "bug bounty". Smith" said the hackers had videos, scripts , personnel files and other sensitive data from the breach.

Guam 'well-equipped' to handle North Korean threat: governor
There's a sense of patriotism among those who cite the island's history of Guam residents serving in the USA military. Their location in a USA territory means its military is just hours from potential flashpoints in the western Pacific.

Extreme Networks, Inc (NASDAQ:EXTR) to Release Earnings on Monday
Laurion Capital Management LP purchased a new stake in Extreme Networks during the first quarter valued at approximately $162,000. TRADEMARK VIOLATION NOTICE: This story was reported by Sports Perspectives and is the sole property of of Sports Perspectives.

General Electric Company (GE) Hits a 52-Week High
The bought was announced in a document with the securities and exchange commission, which is accessible through this hyperlink . BidaskClub raised Portland General Electric from a "sell" rating to a "hold" rating in a report on Monday, July 24th.

Aston Merrygold signs up for Strictly
The pair both took part in The X Factor in 2008 with Alex beating JLS in the final. Strictly Come Dancing will start on BBC One in September.

Hyderabadi hunter Nawab Shafath Ali Khan hired to shoot killer elephant
Of the 11 deaths in the state, nine of the victims were Paharias, Singh said. "He is one of the best out there". An elephant blamed for killing more than a dozen people in Jharkhand and Bihar was shot dead on Friday.

Novo Nordisk A/S (NVO) Raised to Hold at BidaskClub
The value of the investment in Novo Nordisk A/S went from $562,000 to $12,189,000 a change of $11,627,000 since the last quarter. BidaskClub downgraded Novo Nordisk A/S from a "hold" rating to a "sell" rating in a research note on Monday, July 31st.

Groundhog day for Celebrity Big Brother nominees
The Girls Aloud singer and The Bachelorette star locked lips in the bedroom last night, after they were both saved by the public from eviction.

United States missile shield not certain to protect Guam from North Korea
It's not the first time North Korea has threatened Guam, which is a crucial, strategic hub for US forces in the Pacific. In that case, Onedera said that Japan could exercise the right to collective self-defense and intercept the missiles.

© 2015 ExpressNewsline. All Rights reserved.