Автоподбор страны, региона, города
Введите начальные буквы названия и через секунду-две выберите вариант из появившегося списка
Если такого названия в списке нет - напишите нам

Подробнее об автоподборе

Тегов нет

Новые возможности

7 декабря 2018 г. 08:58

ed that there might be other stars

Most critically Sean Davis Color Rush Jersey , their proximity to Earth and the dimness of their red dwarf star, called Trappist-1, will allow astronomers to parse each one's atmosphere in search of chemical signatures of biological activity.


"We have made a crucial step towards finding life out there," said co-author Amaury Triaud, a scientist at the University of Cambridge. "Up to now, I don't think we have had the right planets to find out," he said in a press briefing. "Now we have the right target."


The Trappist-1 system, a mere 39 light years distant, has the largest number of Earth-sized planets known to orbit a single star.


It also has the most within the so-called "temperate zone" - not so hot that water evaporates, nor so cold that it freezes rock-solid.


The discovery adds to growing evidence that our home galaxy, the Milky Way, may be populated with tens of billions of worlds not unlike our own - far more than previously suspected.


Remarkably, professional stargazers may simply have been looking in the wrong place.


"The great idea of this approach was to study planets around the smallest stars of the galaxy, and close to us," said lead author Michael Gillon, a professor at the University of Liege in Belgium.




"That is something nobody did before us - most astronomers were focused on stars like our Sun," he told journalists ahead of publication.


Gillon and his team began to track Trappist-1 - a so-called "ultracool" dwarf star with less than 10 per cent the mass of the Sun - with a dedicated telescope in 2010, and reported last year on three planets in its orbit.


They detected the invisible exoplanets using the so-called "transit" method: when an orbiting world passes between a star and an astronomer peering through a telescope, it dims the starlight by a tiny but measurable amount.


But when subsequent calculations didn't quite tally, Gillon realised that there might be other stars that had escaped Earth-bound observation.


"So we requested time with NASA's Spitzer Space Telescope," said co-author Emmanuel Jehin, also at the University of Liege. "This allowed us to get 20 consecutive 24-hour periods of observation, which was crucial to discovering that we had seven transiting planets."


Looking from Earth, the astronomers could only track activity around the star at night. "From space, we observed continually and matched all the transits," 34 in all.


Compared to the distance between our Sun and its planets, the Trappist-1 family is very tightly bunched. Indeed, the dwarf star and its seven satellites - with orbits ranging from 1.5 to 12 days - would all fit comfortably in the distance between the Sun and its closest planet, Mercury.




If Earth were that close to the Sun, it would be a hellish ball of fire.


But because Trappist-1 emits far less radiation, temperatures on its planets - depending on the atmosphere - could be between zero and 100 degrees Celsius (32 and 212 degrees Fahrenheit), the scientists said.


Gillon and his team have started to analyse the chemical make-up of the atmospheres. "There is at least one combination of molecules, if present with relative abundance, that would tell us there is life, with 99 per cent confidence," said Gillon.


A certain mix of methane, oxygen or ozone, and carbon dioxide, for example, could almost certainly come only from biological sources. "But except for detecting a message from beyond our solar system from intelligence out there, we will never be 100 percent sure," he added.


Someone standing on, say, Trappist-1 D, E or F - the three middle planets - would have a breathtaking panorama of the star and its system, Triaud said.


The red dwarf - which would loom 10 times larger than the Sun in our sky - would be a "deep crimson" shading into a salmon-like colour, he said.


"The view would be beautiful - you would have about 200 times less light that from the Sun on Earth at midday," he added. "It would be like the end of a sunset."

Games > Game Genres > MMORPG > Madden NFL 16 Ultimate TeamFee Free Tickets

Posted by jennycooper in Games on May 5th, 2014


Are you interested to get tickets without fees to sports games, concerts or dance shows? Would you like to be able to take your friends and family with you to a Broadway play or perhaps a hockey game? If the answer is yes, then you are recommended to go online, to feefreeticket! This ingenious and well-organized website will enable you to get no fee nfl tickets for any kind of sports event, theater, Broadway show or concert!


Whether you are a sports fan, a concert fan or simply want to see a really nice play or attend a Broadway show premiere, you know you have to spend quite a big sum of money on tickets which usually include fees. This dreadful thought can push back music or sports enthusiasts due to the fact that they cannot afford to spend a small fortune on a game that they can watch online or at the TV in the comfort of their own home.


However, any game or play seen on the TV from your own sofa cannot compare to the real thing! You cannot feel the positive vibes, the emotion, the love that fans share for that particular sport, team, band or actress. You cannot stand up on your feet and applaud or cheer in the middle of the game, nor can you really see the emotion on the face of the performer. You cannot be able to catch the baseball or be put on the main screen in the middle of the field, nor can you receive the flower thrown by the actor on stage.


Luckily for you, an ingenious website such as FeeFreeTicket can enable you to purchase tickets without fees for basically any sporting event, concert, Broadway show, stand-up comedy show or play. You will also be able to get no fee nfl ticketsfor the hottest sold out concerts and theater, as well as tickets to almost any event nationwide. In o. Cheap Jerseys   Cheap Jerseys From China   Wholesale Authentic Jerseys   Wholesale Cheap NHL Jerseys China   Wholesale NFL Jerseys Online   Wholesale NCAA Hockey Jerseys   Wholesale Cheap Basketball Jerseys   Wholesale MLB Baseball Jerseys   Wholesale Retro Soccer Jerseys   Cheap Jerseys China 

 оценок 0

Автор: Статус: offline tijue
просмотров: 12
Поделиться в:   icon   icon   icon   icon   icon    

Чтобы добавить комментарий Вы должны зарегистрироваться или войти если уже зарегистрированы.

Если у Вас уже есть OpenID, LiveJournal или Blogger аккаунт, Вы можете добавить комментарий просто указав Ваш OpenID или имя пользователя LiveJournal или Blogger.
OpenID:  OpenID LiveJournal Blogger         Войти  
(Вы можете отправить комментарий нажатием комбинации клавиш Ctrl+Enter)