Descubrieron la estrella más grande del Universo

Localizada a través del telescopio VLT en Chile, la estrella tuvo al formarse una masa 320 veces superior a la del Sol.

Un equipo internacional de astrónomos anunció ayer que descubrió, usando el Very Large Telescope (VLT) de Paranal, Chile, y el telescopio espacial Hubble, la estrella más grande jamás observada en el Universo, con destellos 10 millones de veces más potentes que los del Sol.
Bautizada R136a1, esta mega estrella habría tenido al formarse hace más de un millón de años una masa 320 veces superior a la del Sol. Forma parte de un grupo de estrellas gigantes descubiertas por un equipo de astrónomos dirigido por el astrofísico Paul Crowther, profesor de la universidad británica de Sheffield.
Sus rayos ultravioletas son tan intensos que harían la vida terrestre imposible si estuviese en el lugar del Sol, en el centro de nuestro sistema. Crowther explicó que la estrella tiene una edad intermedia y perdió un quinto de su masa inicial.

Read more
http://www.larazon.com.ar

HOT PLANET DISCOVERY (STSci)

New observations by the Hubble Space Telescope’s Cosmic Origins Spectrograph (COS), confirm the existence of a giant scorched extrasolar planet traveling extremely close to its star. Named HD 209458b, it’s being called by astronomers a “cometary planet” because it has the components of a planet – but with a trailing tail like a comet, possibly the result of strong stellar winds sweeping off its super heated atmosphere.

Eric Smith: “Mass is being stripped of at the rate of about 100,000 cars per second. So, a typical big car plant on the Earth might make 100, 200, 300-thousand cars a year. That’s how many they’re making. This planet’s losing that much mass per second.”

HD 209458B is 153 light years from Earth, weighs slightly less than Jupiter, and speeds around its star in about 3 and1/12 days, which means one of our weeks is equal to two of its years.

Eric Smith: “Up to just recently in human history we’ve only known about the planets in our own solar system, and can study those and so we developed theories about how stars and planets formed based upon that. Now, there is just this incredible diversity of planet types, different stellar types, different orbits, and it’s causing us to have to rethink entirely how we believe stars and planets formed.”

 

http://www.nasa.gov/multimedia/podcasting/twan_7_23_10.html

Como viene siendo habitual aprovechamos el post para dar un repaso a las ultimas noticias y videos de los diferentes eventos y misiones de las agencias espaciales internacionales. NASA, ESA, JAXA….etc

Mass Spectrometer: The Molecule Dissector

‘What do you do if you have a sample from another planet, and you want to find out if it contains a certain molecule…maybe even one that will reveal whether the planet can sustain life? When scientists face a situation like this, they use an amazing tool: the mass spectrometer. It separates out materials, allowing scientists to look very closely at a sample and see what’s inside.’

http://www.nasa.gov/centers/goddard/home/index.html

Soccer-Ball-Shaped Molecules Detected in Space

The Spitzer Space Telescope has located some elusive carbon molecules floating in space. Called “Buckyballs,” due to their resemblance to architect Buckminster Fuller’s geodesic domes, these three-dimensional, spherical structures are now the largest molecules known to exist in space, and until now, have escaped detection. Buckyballs hold unique properties in the physical and chemical processes of space .

Robotic Landers: Small With Big Benefits (slight sound issues)

‘NASA and the Johns Hopkins University Applied Physics Laboratory are creating a new generation of smart, versatile robotic landers. for exploring the moon, asteroids, and other airless bodies in our solar system. As small as a golf cart but big in performance, these multi-use landers will enable a variety of exciting missions.’

http://www.nasa.gov/centers/goddard/home/index.html

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