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PBS video about three upcoming next generation telescopes
Posted on 2/26/17 at 1:12 am
Posted on 2/26/17 at 1:12 am
Good overview of three telescopes currently in production: LINK
James Webb Space Telescope
Giant Magellan Telescope
Large Synoptic Survey Telescope
James Webb Space Telescope
quote:
The James Webb Space Telescope (JWST), previously known as Next Generation Space Telescope (NGST), is a part of NASA's ongoing Flagship program. It is under construction and scheduled to launch in October 2018. The JWST will offer unprecedented resolution and sensitivity from long-wavelength (orange-red) visible light, through near-infrared to the mid-infrared (0.6 to 27 micrometers). While Hubble has a 2.4-meter (7.9 ft) mirror, the JWST features a larger and segmented 6.5-meter-diameter (21 ft 4 in) primary mirror and will be located near the Earth–Sun L2 point. A large sunshield will keep its mirror and four science instruments below 50 K (-220 °C; -370 °F).
Giant Magellan Telescope
quote:
The Giant Magellan Telescope (GMT) is a ground-based extremely large telescope under construction, planned for completion in 2025.[6] It will consist of seven 8.4 m (27.6 ft) diameter primary segments,[7] with the resolving power of a 24.5 m (80.4 ft) primary mirror and collecting area equivalent to a 22.0 m (72.2 ft) one,[8] which is about 368 square meters.[5] The telescope is expected to have the resolving power 10 times greater than the Hubble Space Telescope, and will be the largest optical observatory in the world, at the time of its first light.
Large Synoptic Survey Telescope
quote:
The Large Synoptic Survey Telescope (LSST) is a wide-field survey reflecting telescope with an 8.4-meter primary mirror,[10][11] currently under construction, that will photograph the entire available sky every few nights.[12] The telescope uses a novel 3-mirror design which delivers sharp images over a very wide 3.5-degree diameter field of view, feeding a 3.2-gigapixel CCD imaging camera, the largest digital camera ever constructed.
This post was edited on 2/26/17 at 1:14 am
Posted on 2/26/17 at 1:16 am to DavidTheGnome
I'll honestly be surprised if jwst works as advertised. It's NASA's version of the F35. Years behind schedule and billions over budget.
Posted on 2/26/17 at 1:20 am to GeauxxxTigers23
I hope that's not the case but as with anything the chance of failure exists. They only get one shot as well, it's not in LEO like Hubble but rather out at one of the Lagrange points so no space walks to fix it. Everything has been tested, tested, and then tested some more though to minimize the risk.
Posted on 2/26/17 at 1:28 am to DavidTheGnome
TIL the people that make mason jars also build space and aerospace products.
Posted on 2/26/17 at 1:30 am to DavidTheGnome
Here's a good size comparison of the mirrors of well known current as well as planned (and in some cases cancelled) telescopes: LINK
Posted on 2/26/17 at 1:54 am to DavidTheGnome
This stuff makes me hard
Posted on 2/26/17 at 5:24 am to DavidTheGnome
And in the ultimate irony, we'll see a dyson sphere or some proof of advanced life right before we spot a giant asteroid hurtling at us.
But seriously, I love this stuff.
But seriously, I love this stuff.
Posted on 2/26/17 at 7:49 am to DavidTheGnome
Cool stuff. Though I hope nobody mixes up metric and English measurements like they did with Hubble.
Posted on 2/26/17 at 8:02 am to DavidTheGnome
People often get into debates about how NASA and the NSF allocate funding but I think these pursuits are possibly the best spent dollars. It is amazing how one observation such as the Hubble Deep Field experiment can change our entire understanding of the universe.
Posted on 2/26/17 at 10:28 am to Backinthe615
quote:
And in the ultimate irony, we'll see a dyson sphere or some proof of advanced life right before we spot a giant asteroid hurtling at us.
Due to its very nature I'm not sure it's even possible to see a Dyson sphere.
Posted on 2/26/17 at 12:59 pm to soccerfüt
The Thirty Meter Telescope is one also under construction, notable because of the protests from native Hawaiianers since it's being built on Mauna Kea which is considered sacred.
Thirty Meter Telescope
Thirty Meter Telescope
quote:
The Thirty Meter Telescope (TMT) is a proposed astronomical observatory with an extremely large telescope (ELT) that has become the source of controversy over its planned location on Mauna Kea in the US state of Hawaii. Construction of the TMT on land which is claimed to be sacred to Native Hawaiian culture and religion,[5] attracted international coverage[6] after October 2014, when construction was temporarily halted voluntarily due to protests. While construction of the telescope was set to resume on April 2 and later on June 24, 2015, it was blocked by further protests each time.[7] While it was approved by the Board of Land and Natural Resources,[8][9] the State Supreme Court of Hawaii invalidated the TMT's building permits in December 2015, ruling that due process was not followed when the board approved the permits. Roque de los Muchachos Observatory, La Palma, Canary Islands, Spain may be the alternative site if construction cannot go forward in Hawaii. [10][11][12] The TMT will be the last area on Mauna Kea on which any telescope will ever be built. [13]
This post was edited on 2/26/17 at 1:00 pm
Posted on 2/26/17 at 1:12 pm to DavidTheGnome
I'll be all in this thread tonight.
Posted on 2/26/17 at 1:32 pm to GeauxxxTigers23
It has faced some major engineering challenges. You can't plan for some issues. I believe we will place it orbiting in L2. If something minor happens that prevents it from opening up, L2 is beyond our means of physically reaching it. Would be a complete loss.
Posted on 2/26/17 at 2:52 pm to Bullfrog
That isn't what happened with hubble.
Posted on 2/27/17 at 9:59 am to MountainTiger
Posted on 2/27/17 at 10:02 am to DavidTheGnome
what a waste of money
Posted on 2/27/17 at 10:02 am to DavidTheGnome
Funny... I thought Hooker would have been a lot larger.
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