Geregistreerd op: 24 Jan 2018
|Geplaatst: 04-05-2018 05:18:19 Onderwerp: Andrea Barzagli Italy Jersey
|As the Hubble Space Telescope celebrates 25 years in space this week Davide Astori Italy Jersey , NASA and its international partners are building an even more powerful tool to look deeper into the universe than ever before.
The James Webb Space Telescope will be 100 times more potent than Hubble, and will launch in 2018 on a mission to give astronomers an unprecedented glimpse at the first galaxies that formed in the early universe.
"JWST will be able to see back to about 200 million years after the Big Bang," NASA said on its website.
It described the telescope as a "powerful time machine with infrared vision that will peer back over 13.5 billion years to see the first stars and galaxies forming out of the darkness of the early universe."
The project has drawn scrutiny from lawmakers for its ballooning costs -- now at about $8.8 billion, far higher than the initial estimate of $3.5 billion.
But NASA has promised to keep the next-generation telescope on track for its October 2018 launch.
"What the Webb will really be doing is looking at the first galaxies of the universe," Webb telescope observatory project scientist Mark Clampin told AFP at NASA's Goddard Space Flight Center in Greenbelt, Maryland.
"We will also be able Daniele Padelli Italy Jersey , with these capabilities, to look in very dark parts of the universe where stars are being born."
Inside a massive room that is partially closed off from view, in clean room where no dust can harm the telescope, a team of engineers dressed in white, resembling surgeons, work on building the JWST.
The space telescope will weigh 6.4 tons. JWST's main mirror will be 6.5 meters (yards) in diameter Claudio Marchisio Italy Jersey , three times as large as Hubble's.
A joint project of NASA, the European and canadian space agencies, JWST will carry four instruments, including cameras and spectrometers that can capture extremely faint signals.
Infra-red capability will help it observe distant celestial bodies, and its camera shutter will be able to remain open for long periods, explained Matt Greenhouse Ciro Immobile Italy Jersey , JWST project scientist for the science instrument payload.
"The Webb will have 70 times the light-gathering capacity of Hubble. So the combination of the large size and the infra-red capabilities will allow us to observe this epic of the universe past," he said in an interview.
- Hunt for life -
Even more, the telescope should further the search for life elsewhere in the universe by opening a new window on planets outside the solar system -- known as exoplanets -- that might have water and orbit their stars at a suitable distance to prevent freezing or boiling.
Already, NASA's Kepler Space telescope, launched in 2009, has helped astronomers identify thousands of exoplanets. JWST is expected to propel that research even further.
"Webb is quite big enough to have a high probability of finding bio signatures in the atmosphere of exoplanets Blank Italy Jersey , evidence of life," Greenhouse said.
"We have sensors on board, equipment on board that will enable us to study the atmosphere of exoplanets spectroscopically. So we will be able to understand the composition of those atmospheres," he added.
"We can make big progress in the search for life."
Unlike the Hubble Space Telescope, which circles the Earth, the JWST will go even further Antonio Candreva Italy Jersey , to a place called L2, for LaGrange Point, 930,000 miles (1.5 million kilometers) away in space.
That distance will keep the telescope cold, prevent it from being blinded by its own infra-red light and shelter it from radiation.
"It will follow the Earth around the Sun over the course of the year. So it's in a Sun center orbit instead of an Earth center orbit," said Greenhouse.
The heavy telescope is scheduled to launch atop an Ariane 5 rocket Angelo Ogbonna Italy Jersey , made by the European Space Agency, from French Guiana in October 2018.
"Just as Hubble rewrote all the textbooks, Webb will rewrite it again," said Greenhouse.
Speeding up your Mac painless Lingafelt Matalka
Submitted 2014-03-14 16:02:18
There are several reasons why your mac could be running much slower than usual and it's also essential that you think of How to speed up your mac. Ideally, extented use of mac prospects to bloating of settings and additional files, which ends up up slowing the computer's performance over time. Fortunately Andrea Barzagli Italy Jersey , there are so many tricks upon how to speed up Mac that you should benefit from and give your pc a remodeling. To start with, it is essential that you update your system so as to deal with the problem of a sluggish performing mac. In this regard, keep your operating-system and software program up to date and will also keep you program secure and also running at its greatest.
In most cases, upgrading the software boosts the computer's performance and this will also aid remove harmful files that may slow down the computer. Next, another trick of how to speed up mac requires uninstalling outdated programs. They are of no good being in your computer since you will not be using them after all. So, old programs which are not actively running simply take your storage space and removing them is very important in order to free your computer. Once the hard drive runs out of free space Alessio Cerci Italy Jersey , this can lead to decreased overall performance. Fortunately, this is a very easy factor to do while you just need to drag them into the trash can. Nevertheless, this could leave behind some old files and may end up bogging your program down.
A better way of how to speed up my mac through uninstalling these kinds of programs is simply by making use of a good uninstaller program and will also ensure that every one of the old applications are completely ta. Cheap Team Finland Jerseys Wholesale Czech Republic Jerseys Wholesale Team USA Jerseys Cheap Russia Hockey Jerseys Cheap Oilers Jerseys Cheap Kings Jerseys Cheap Winnipeg Jets Jerseys Cheap San Jose Sharks Jerseys Cheap Ottawa Senators Jerseys Cheap New York Rangers Jerseys