Inter-stellxr-blog - Lost Among The Stars

The planet closest to our Solar System might have just disappeared

Oops.

Alpha Centauri bb, an Earth-like planet orbiting our closest star, has just vanished. In fact, a new study suggests it never actually existed outside of a blip in the data.

The planet was discovered in 2012, and it was a pretty big deal at the time. According to researchers’ best estimates, Alpha Centauri bb appeared to have a mass similar to Earth and was orbiting its star at a distance similar to Mercury.

Best of all, it was only 4.3 light-years away – a whole lot closer than most other Earth-like exoplanets – and existed in a star system that had housed the science-fiction characters of Avatar and Transformers.

But a year after its discovery, a separate group of researchers called the discovery into question, when they found only weak evidence that the planet existed. And now a new study suggests that Alpha Centauri bb was never more than a ‘ghost’ in the data.

The research serves as a cautionary tale to astrophysicists hunting for evidence of planets orbiting distant stars, and reminds us of how hard it is to work out what’s going on using sporadic data taken from distant star systems.

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Astronomers have found compelling signs for a supermassive black hole in the center of almost every large galaxy they have scrutinized, and the Milky Way is no exception. The core of our galaxy harbors an object called Sagittarius A* (pronounced A-star) — a black hole with about 4 million times the Sun’s mass. It’s the 19th confirmed black hole in the Milky Way, and it sits dead in the center.

The evidence takes several forms. First, intense radio waves and X-rays flow from an accretion disk that spans a region no bigger than our solar system. But the proof comes from careful tracking of the motions of stars as they orbit the central mass. It’s the same method astronomers use to hunt for globular cluster black holes, but the huge size of the object in the Milky Way’s heart makes these motions far easier to see. Analyzing the stellar orbits leads directly to the black hole’s mass.

The count of black holes in our galaxy likely will continue to grow in the years ahead, but it never will outpace the flood of planet discoveries. The ability to find planets has reached the stage where it’s surprising when a week goes by without a new detection. Black holes hide their identities much better, either behind the cloak of an event horizon or in isolation from other objects. Perhaps the biggest surprise in the study of our galaxy’s black holes is that we’ve already found 19.

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What is this? http://space-pics.tumblr.com/ source:http://imgur.com/r/Astronomy/WhU2y3g

This is how fast the space probe is.

More about New Horizons >>

This is what our night sky could look like guys.

You don't need piercings to be hot >^<

>/////< omg thank

Tadashi, Hiro, and Aunt Cass

Milky Way seen from the Moon, err, Death Valley [OC][3648x4713] http://space-pics.tumblr.com/

October 13, 1966 – Gemini 12 astronaut Buzz Aldrin undergoes zero-gravity training aboard an Air Force KC-135 vomit comet. (NASA)

T-51 days (October 14) - OA-4 Cygnus service module arrives at KSC Marking a major milestone in its prelaunch processing flow, the service module for the Cygnus spacecraft’s return to flight arrived at Kennedy Space Center earlier this week. The pressurized cargo module for the OA-4 mission arrived at Kennedy in early August, and technicians have been checking out the module ahead of cargo stowing. OA-4 marks a significant shift in the Cygnus program, not just because it is the spacecraft’s return to flight, but also the first flight of the Enhanced Cygnus. The cargo module is 3.9 feet longer than the initial Standard Cygnus, allowing the spacecraft to transport over 3,300 extra pounds of cargo. The Service Module also boasts new Orbital ATK-made Ultraflex solar arrays, which are lighter than the original rectangular arrays made by DutchSpace. The image below shows a comparison between the two versions of the spacecraft, with the Enhanced Cygnus on the right.

Final assembly and cargo stowage is expected to occur in late October and early November. Encapsulation inside an Atlas V 400-series payload fairing will occur in mid November, followed by rollout to SLC-41 and vehicle integration in late November. Currently, the launch of OA-4 is scheduled for December 3, though that date may move up or be pushed back depending on various factors. It will be the first flight of the spacecraft since an October 29, 2014 launch failure that destroyed the spacecraft and subsequently grounded the program. The enhanced Antares 200 rocket is undergoing final integration and assembly at Wallops Island, Virginia, and Orbital ATK teams are preparing for a period of pad testing. The next flight of Cygnus on an Antares is scheduled for some time in the first half of 2016. Until then, Orbital ATK purchased two Atlas V 401 rockets to launch their enhanced Cygnus spacecraft; these missions are designated OA-4 and OA-5. The second flight is slated for sometime in spring of 2016.