Mostrar mensagens com a etiqueta Hubble. Mostrar todas as mensagens
Mostrar mensagens com a etiqueta Hubble. Mostrar todas as mensagens

quarta-feira, 1 de janeiro de 2020

Planetas de Algodão Doce?

https://jmonline.com.br/novo/?noticias,1,GERAL,190426
Citando:
"Eles têm uma densidade muito baixa – daí o elo com o algodão doce. Uma nova pesquisa, que analisou três desses planetasao redor da estrela Kepler 51, sugere que a baixa densidade pode ser uma fase temporária de certos planetas. O estudo está diponível no periódico científico ArXiv, e também será publicado no Astronomical Journal."

segunda-feira, 17 de dezembro de 2018

A constante de Hubble

https://www.theguardian.com/science/2018/may/10/the-answer-to-life-the-universe-and-everything-might-be-73-or-67

Citando:
"A crisis of cosmic proportions is brewing: the universe is expanding 9% faster than it ought to be and scientists are not sure why.

The latest, most precise, estimate of the universe’s current rate of expansion - a value known as the Hubble constant - comes from observations by the European Space Agency’s Gaia mission, which is conducting the most detailed ever three-dimensional survey of the Milky Way."


domingo, 16 de dezembro de 2018

Hot Neptunes

https://bgr.com/2018/12/16/exoplanet-vaporized-evaporation-hubble-telescope/

Citando:
"The exoplanet, called GJ 3470b, is located near what researchers call the “Hot Neptune Desert” around its host star. Scientists believe that there’s a lack of such planets because they are completely destroyed over time due to their close relationship with the stars they orbit, and GJ 3470b might be the next to go.

One of GJ 3470b’s fellow planets is GJ 436b, which astronomers believe is losing its atmosphere as its star strips it away. Scientists think that 436b will survive the ordeal without being completely destroyed, but 3470b is in a much tougher spot. 3470b is being stripped of mass 100 times faster than 436b, and it’s possible that the planet will be completely vaporized."


quarta-feira, 19 de setembro de 2018

Estrela de neutrões, Infra-vermelhos e Hubble

https://www.slashgear.com/hubble-discovery-could-change-our-understanding-of-neutron-star-evolution-19546375/

Citando:
"The discovery indicates two possibilities according to the scientists. One theory is that there is a disc of dust surrounding the neutron star and the other has to do with a strong wind coming off the neutron star and hitting gas in interstellar space that the star is moving through. The neutron star in question is called RX J0806.4-4123."

terça-feira, 4 de setembro de 2018

As auroras de Saturno (Hubble)

https://www.standard.co.uk/news/world/amazing-nasa-images-give-best-view-ever-of-saturns-stunning-aurora-a3927436.html

Citando:
"Astronomers using the ESA Hubble Space telescope took a series of shots using ultraviolet light, resulting in composites that show a wider range of light than humans can see with the naked eye.

NASA described them as "the most comprehensive picture so far of Saturn’s Aurora Borealis".


The images were taken last year over a period of seven months, as the Hubble's Space Telescope Imaging Spectrograph allowed scientists to monitor the behaviour of the auroras for an extended period."


terça-feira, 31 de julho de 2018

Galáxia vizinha fotografada

https://www.nasa.gov/image-feature/goddard/2018/hubble-images-milky-way-s-big-sister

Citando:
"This image taken by the NASA/ESA Hubble Space Telescope’s Wide Field Camera 3 (WFC3) shows a beautiful spiral galaxy called NGC 6744. At first glance, it resembles our Milky Way albeit larger, measuring more than 200,000 light-years across compared to a 100,000-light-year diameter for our home galaxy.

NGC 6744 is similar to our home galaxy in more ways than one."


sábado, 30 de junho de 2018

https://www.universetoday.com/139536/a-long-exposure-hubble-image-of-a-galaxy-cluster-also-turned-up-22-asteroids/

Citando:
"The Hubble Space Telescope is the oldest space telescope in operation, having spent the past twenty-eight years in orbit. Nevertheless, this mission is still hard at work revealing things about our Solar System, neighboring exoplanets, and some of the farthest reaches of the Universe. And every so often, it also captures an image that happens to turn up something interesting and unexpected.

Recently, while conducting a study of Abell 370, a galaxy cluster located approximately four billion light-years away in the constellation Cetus (the Sea Monster), Hubble managed to spot something in foreground. While observing this collection of several hundred galaxiess, the image was photobombed by 22 asteroids whose tails created streaks that looked like background astronomical phenomena."

domingo, 6 de março de 2016

Galáxia a 13,4 Mal fotografada

O objecto mais distante até agora conhecido foi fotografado pelo Hubble. Tinha o universo cerca de 400M anos apenas e 3% do seu tamanho:
http://www.abola.pt/mundos/ver.aspx?id=600973