COROT has found the smallest terrestrial planet ever detected outside the Solar System. The amazing planet is less than twice the size of Earth and orbits a Sun-like star. Its temperature is so high that it is possibly covered in lava or water vapour.
About 330 exoplanets have been discovered so far, most of which are gas giants with characteristics similar to Jupiter and Neptune. The new find, COROT-Exo-7b, is different: its diameter is less than twice that of Earth and it orbits its star once every 20 hours. It is located very close to its parent star, and has a high temperature, between 1000 and 1500°C. Astronomers detected the new planet as it transited its parent star, dimming the light from the star as it passed in front of it.
Some stars go ballistic, racing through interstellar space like bullets and tearing through clouds of gas. Images from NASA's Hubble Space Telescope, taken by Raghvendra Sahai of NASA's Jet Propulsion Laboratory, Pasadena, Calif., and colleagues reveal 14 of these young, runaway stars.
The stars are plowing through regions of dense interstellar gas, creating brilliant arrowhead structures and trailing tails of glowing gas. These arrowheads, or bow shocks, form when the stars' powerful stellar winds, streams of matter flowing from the stars, slam into surrounding dense gas. The phenomenon is similar to that seen when a speeding boat pushes through water on a lake.
The Galapagos Islands are an archipelago situated some 1 000 km to the west of Ecuador in the Pacific Ocean. They were formed by volcanic activity around 10 million years ago. Out of the 19 islands, two are still active volcanoes. Due to the isolation of the islands, a very unique ecosystem developed and many of the species found there exist nowhere else on Earth. All reptiles, half of the plants and some 40% of the birds are endemic.
If it's daytime, why am I as an astronomer even up? But all the other astronomers work days, so dutifully, I'm at work by 9am each day. I code, manage, have meetings. I estimate that I only get 3 minutes of actual astronomical observation in each morning.
That's the time I get to see the fresh data on the 'big wall' at work, right by the coffee pot. After that quick glance, it'd down to work. Technically, I'm an astronomer, but in practice, I'm a modeler whose work enables others to do science. Working days, I feel we've lost our connection to the night skies.
But those three minutes of seeing never-before viewed images of the Sun, they're glorious.
Variations in the brightness of the Q0957+561 quasar, also known as the “twin quasar” due to its duplicated image on Earth, are intrinsic to the entity itself and not caused by the gravitational effects of possible planets or stars from a far away galaxy.
This is the conclusion of a study carried out by Spanish researchers resolving a mystery that has intrigued astronomers for the past 30 years.
Astronomers have observed the intense heating of a distant planet as it swung close to its parent star, providing important clues to the atmospheric properties of the planet. With that data, astronomers at the University of California, Santa Cruz were able to generate 'realistic' images of the planet by feeding the data into computer simulations of the planet's atmosphere. The researchers used NASA's Spitzer Space Telescope to obtain infrared measurements of the heat emanating from the planet as it whipped behind and close to its star. In just six hours, the planet's temperature rose from 800 to 1,500 Kelvin (980 to 2,240 degrees Fahrenheit).
We get a spectacular new into the active galaxy Centaurus A - NGC 5128 - as the jets and lobes emanating from the central black hole have been imaged at submillimeter wavelengths for the first time.
Centaurus A is our nearest giant galaxy - about 13 million light-years away in the southern constellation of Centaurus. It is an elliptical galaxy, currently merging with a companion spiral galaxy, resulting in areas of intense star formation and making it one of the most spectacular objects in the sky. Centaurus A hosts a very active and highly luminous central region, caused by the presence of a supermassive black hole (see ESO 04/01), and is the source of strong radio and X-ray emission.
Using Mini-SAR instrument, a lightweight, synthetic aperture radar, flying aboard India's Chandrayaan-1 spacecraft, scientists are getting their first look inside the moon's coldest, darkest craters.
The images show the floors of permanently-shadowed polar craters on the moon that aren't visible from Earth. Scientists are using the instrument to map and search the insides of the craters for water ice.
Galaxies are the building blocks of the Universe. Each of them comprises some hundred billion radiant stars, such as our sun, which extend across about 50,000 light years. Every galaxy is embedded in a spherical halo made of dark matter that cannot be seen but is detected through its massive gravitational attraction. The exact nature of this matter is still unknown.
In 1960, Dr. Frank Drake developed an equation that predicts the number of intelligent civilizations in our galaxy. It's a simple equation -- the number of intelligent civilizations in our galaxy is equal to the product of all the following numbers:
- The total number of stars in the galaxy
- The fraction of stars that have planets orbiting them
- The number of planets orbiting each star that are capable of supporting life
- The fraction of planets capable of supporting life that actually do support life
- The fraction of planets supporting life that support intelligent life