There are more than 3,900 valid planets outside our solar system. Most of them were detected as a result of the "corridors" – cases when planting plants; crossing her star, stifling her light in detail. These can run in the starlight with some knowledge of soldiers about their size; planet and the distance from the star.
But getting more information about the planet, and # 39; including oxygen acres, water and other life signs, many more powerful devices are needed. Amazingly, these would be much larger telegopy in the place, with a mirror and a collection as well as some of the largest land areas. NASA engineers are now developing cell philanthropy designs; such a re-generation, which includes "divide" telescopes with many mirrors that can be collected or removed to create one large telescope once & # 39; and was inserted into space.
The future NASA James Webb Space Telescope is an example of a primary mirror with a section, with a 6.5 meter diameter and 18 six-page sections. Re-generational telescopes are expected to exceed 15 meters, with more than 100 specimens.
One challenge for specialized chocolate is a way to keep the imaginative mirror areas and aim with a straightforward system. These telescopes would be fitted with corrugated – machines that are sufficiently sensitive to the light that the star gives and the light is very weak; It may be spread by a flattened planet. But the smallest movement in any of the telescope parts is to cast off a coronograph measure and to prevent the amount of oxygen, water or other planetary features.
Now MIT engines suggest that another spacecraft may be fitted with a simple laser in the second way, which can be used. Provides a clear, clear light close to the target system that can make the telescope Use a place of space in a place to keep it steady.
In a paper that was published today in the # 39; Journal of Journalism, researchers have shown that laser reel design would be possible today's technology. The researchers say that the laser light is from the second spacecraft to make the system stable and determine the application for accuracy in large telescope, and # 39; save time and money, and allow telescope designs to be more flexible.
"This paper suggests that we may be able to build telescope in the future, which is a less stable, but that it can use a clear source in terms of being sustainable, "said Ewan Douglas, a postdoc in the Department of Aeronautics and MIT Astronautics and the principal author of his paper.
The paper also includes Kerri Cahoy, a professor of aeronautics and astronautics at MIT, along with James Clark and Weston Marlow degree students at MIT, and Jared Male, Olivier Guyon, and Jennifer Lumbres from the University of Arizona.
In the crosses
For more than a hundred years, radios have been using real stars as "guides" to consolidate ground based roofing.
"If the telescope device or garages were inequality causing your telescope to run a little faster or slower, you could look at your guiding star on eyebrows , and keeps tracking as long as you've been looking long, "said Douglas.
In the 1990s, scientists began to use lasers on the ground as steering stars with an interesting sodium in the upper atmosphere, naming the lasers in the air to create a light point 40 miles from the ground. Then cellphones can reinforce telescope. using the light light, which could be created anywhere the rhetorologist wanted to express the telescope.
"Now we are expanding that idea, rather than identifying a laser from the ground into the space, we're smashing from space, to telescope in space , "said Douglas. The telescopic of the earth must have guiding stars to affect the atmosphere, but space telegop for exoplanet images must change in detail the temperature of the system and any disturbance due to movement.
The idea of laser direction rose up based on a part of a NASA-funded project. The agency has been & # 39; consider designing for large telespoons, isolated in the area, and ask the researchers to find ways to reduce the costs of mass spectators.
"The reason for this is now that NASA needs to make a decision in the next couple of years if it's the great flavor of our fashion in the coming years," said Douglas. "That decision is currently happening, just as the conclusions for Teileascop Space Hubble were pulled in the 1960s, but it did not start until the 1990s."
Cahoy's work has been developing laser communications for use in CubeSats, which is a large box box that can be built and installed into space at a fraction of the current spacecraft cost.
For this new inspection, researchers opened the flame, integrated in CubeSat or SmallSat slightly larger, to use a large telescope consistency, determined to be followed after LUVOIR NASA (for Great UV Screen Optic Survey) is a conceptual design that includes many mirrors that would be collected in a place.
Researchers have estimated that such a teascope still needs to remain completely, within 10 picometers – about a quarter; in diameter of hydrogen atoms – to put a coronagraph on board to accurately measure the light of its planet, as well as its star.
"There is a worry about spacecraft, such as a small change in the sun's area, or a piece of electronic material that switches and changes the heat that is split over its & # 39; spaceboat, which means that the structure has a large expansion or bends, "Douglas says. "If you are worried about 10 picometers, you will begin to see a change in the star light pattern inside the telescope, and the changes that you can not light to bring a star perfectly to light that is marked. "
The team came with a general design for a laser steering wheel that would be far away from telescope to be seen as a standing star – about ten thousands of miles away – and that would emphasize back and light the telescope mirror, each of which would show the camera laser light on board. That camera would measure the level of this light to & # 39; appear over time. Any change of 10 picometers or more would be a compromise identification of the possible telephonop consistency, aboard actors, then quickly.
To find out if such a designer star design could be made possible by today's laser technology, Douglas and Cahoy worked with colleagues at the University of Arizona to show different sources of sources, so they could see, for example, how clear & # 39; a laser would provide some of the telescope settings information, or to provide sustainability to & # 39; Using models of stabilization of extracts from large room halls. They then spoke a set of laser broadcasters already and measured how each laser had to be stable, strong and far from the telescope to be a reliable guiding star.
In general, they found that laser books design was capable of existing technologies, and that the system could be able to; Fully answered within SmallSat about the size of cubic feet. Douglas says that one star could "watch" a telescope, a & # 39; travel from one star to the next length while the telescope is a? lighting target targets. However, this would require the smaller spacecraft to travel hundreds of thousands of miles along with the telescope at a distance, when the telescope is in a position; go back to watch different star.
Instead, Douglas says that a small fleet of guiding stars could be used, fairly and individually throughout the river, to help keep telescope steady because it does exploring many informal systems. Cahoy says that NASA's recent MARCO CubeSats success, which supports the Mars Insight externally as a relay relay, shows that CubeSats have transition systems working in an internet room, for a longer and longer time.
"Now we analyze existing transition systems and show how best to do this, and how much spacecraft we would like to be Jumping together in space, "said Douglas. "At the end, we believe that this is a way of reducing down the cost of these big telespopts."