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European Extremely Large Telescope Size Comparison
http://forum.astra-nj.org/viewtopic.php?f=3&t=646
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Author:  BetaDraconis [ Thu May 14, 2015 10:36 am ]
Post subject:  European Extremely Large Telescope Size Comparison

Image

This animation, courtesy of Gizmodo, gives one an idea of the scale of the EELT under construction in Chile.

Quote:
According to the European Southern Observatory, this revolutionary new ground-based telescope is going to be ‘Earth’s biggest eye on the sky’: it will have a 39-meter main mirror and will gather 13 times more light than the largest optical telescopes existing today. Moreover, the E-ELT will gather 100 million times more light than the human eye, 8 million times more than Galileo’s telescope, and 26 times more than a single Very Large Telescope Unit.


Wow.

http://gizmodo.com/look-how-extremely-l ... 1703844268

Author:  BetaDraconis [ Sun Mar 27, 2016 9:50 am ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

If you think that's big, check out China's FAST radio telescope currently under construction.

Image

Those are people around the center.

http://i.imgur.com/qc3AoHi.jpg for a larger version.

Author:  BetaDraconis [ Tue Jan 03, 2017 8:12 am ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

NASA Plans to Build a Gigantic Space Telescope from 2 Tiny CubeSats

https://www.scientificamerican.com/arti ... -cubesats/

Quote:
Scheduled for launch in early 2017, the roughly $1-million mission could pave the way for a new class of instrument that can peer through the sun's glare or at distant alien planets, without requiring a massive single scope.


Infographic of how it works provided along with analysis.

Author:  BetaDraconis [ Tue Feb 14, 2017 10:27 am ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Atop Mt. Wilson, retired engineers keep alive astronomy's 'Sistine Chapel'

http://www.latimes.com/local/california ... story.html

Quote:
“But raising funds has been a challenge. That’s why our volunteer engineers are heroes. They are keeping it alive. Without them and other supporters, these magnificent instruments would just be cold hunks of steel and glass.”

Author:  BetaDraconis [ Thu Mar 16, 2017 8:39 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

NASA Looks at Using the Sun as a Giant Gravity Lens to Study Alien Planets

http://www.dailygalaxy.com/my_weblog/20 ... -lens.html

Quote:
An Italian space scientist, Claudio Maccone, who chairs the International Academy of Astronautics Permanent SETI Committee, proposed that gravitational lensing could be used for something even more extraordinary: searching for radio signals from alien civilizations, using the sun as a gravitational lens to make an extraordinarily sensitive radio telescope.

Author:  BetaDraconis [ Tue May 16, 2017 3:18 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

PLANETS Telescope: Building Toward Colossus

https://www.centauri-dreams.org/?p=37739

Quote:
The PLANETS instrument will be optimized for studying the exo-atmospheres of the rocky planets in our own Solar System, but will also delve into the atmospheres and surfaces of bright nearby exoplanets and examine circumstellar disks in young stellar systems. It also sets the stage for biosignature detection as we begin to upgrade its scalable technologies.


and...

Colossus and SETI: Searching for Heat Signatures

https://www.centauri-dreams.org/?p=37748

Quote:
An instrument like this has sufficient aperture and scattered light suppression to detect exoplanet biomarkers and, if they exist, the markers of extraterrestrial civilizations. It’s on this latter issue that I want to focus today. Over the past few years, we’ve delved into what is being called ‘Dysonian SETI,’ the search for other civilizations not through dedicated beacons but astronomical evidence of their activities. The reference to Freeman Dyson goes back to his description of spherical structures for gathering the total luminosity of a host star, the so-called Dyson sphere, or as it is also imagined, the Dyson ‘swarm’ of energy-gathering technology.

Author:  BetaDraconis [ Mon May 22, 2017 4:07 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Secondary mirror of ELT successfully cast—largest convex mirror blank ever created

https://phys.org/news/2017-05-secondary ... rgest.html


Quote:
The blank of the secondary mirror now has to go through a slow cool-down, machining and heat treatment sequence over the next year. It will then be ready to be ground to precisely the right shape and polished. The French company Safran Reosc will carry this out, along with additional testing. The blank will be shaped and polished to a precision of 15 nanometres (15 millionths of a millimetre) across the entire optical surface.

Author:  BetaDraconis [ Sat May 27, 2017 1:19 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Construction begins on world's largest telescope in Chilean desert

http://www.reuters.com/article/us-chile ... SKBN18M2JX

Quote:
Construction began in Chile on Friday on the European Extremely Large Telescope, which when completed will be the world's largest optical telescope, some five times larger than the top observing instruments in use today.

Author:  BetaDraconis [ Tue May 30, 2017 4:02 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Using the Sun as a Cosmic Telescope

https://blogs.scientificamerican.com/ob ... telescope/

Quote:
Alternatively, propellant-free propulsion techniques such as sunlight-reflecting “solar sails” could allow high escape velocities with perihelia of 20 solar radii, but these would require sail area-to-mass ratios larger than the current state-of-the-art. Either approach could reach the solar lens’ focal line in 25-30 years. Although it seems feasible, the engineering aspects of building an astronomical facility on scales this large are still unexplored; only recently did we begin to consider such concepts.

Author:  BetaDraconis [ Fri Aug 11, 2017 8:21 am ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

The Secret Lab hidden inside a Famous Monument

http://www.bbc.com/future/story/2017081 ... s-monument

Quote:
To see why, Smith ushers me into the centre of the room. Looking up through a metal grate, there’s a clear view all the way through the spiral staircase, up to the highest point in the building. Right at the top, hidden inside a decorative golden orb, is yet another trap door – this time made of heavy iron. When it’s opened, you can look all the way up, from the basement lab into the night sky. In fact, the entire building is a giant telescope.

Author:  BetaDraconis [ Fri Sep 29, 2017 3:42 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

NASA Postpones Launch of James Webb Space Telescope

https://www.scientificamerican.com/arti ... telescope/

Quote:
The multibillion-dollar observatory is now scheduled to launch in spring of 2019.

Author:  BetaDraconis [ Fri Oct 06, 2017 9:37 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

New Telescope Attachment Allows Ground-Based Observations of New Worlds to Rival Those from Space

http://www.astrowatch.net/2017/10/new-t ... round.html

Quote:
“This inexpensive technology delivers high photometric precision in observations of exoplanets as they transit -- cross in front of -- the bright stars that they orbit,” said Gudmundur Stefansson, graduate student at Penn State, NASA Earth and Space Science Fellow, and lead author of the paper. “This technology is especially relevant considering the impending launch of NASA’s Transiting Exoplanet Survey Satellite (TESS) early in 2018. It is up to ground-based facilities to rapidly and reliably follow-up on candidate planets that are identified by TESS.”

Author:  BetaDraconis [ Mon Oct 30, 2017 11:05 am ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

eVscope | 100 times more powerful than a classical telescope

https://www.kickstarter.com/projects/un ... lassical-t

The SETI Institue actually got their mitts on one:

https://twitter.com/SETIInstitute/statu ... 3492671488

Author:  BetaDraconis [ Sat Nov 04, 2017 5:20 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

National Astronomical Observatory of Chile

https://www.atlasobscura.com/places/nat ... y-of-chile

Quote:
Thanks to many large areas with little or no light pollution, low precipitation, and somewhere around 200 cloudless nights every year, Chile is Earth’s unofficial astronomy capital. By 2020 it’s set to have 70 percent of the world’s astronomical infrastructure.

Author:  BetaDraconis [ Sun Nov 05, 2017 11:22 am ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

China To Build World's Highest Planetarium In Tibet Next Year

https://www.ndtv.com/world-news/china-t ... ar-1771335

Quote:
The planetarium, which is China's first, will have the region's largest optical astronomical telescope, with a 1- meter-diameter lens, and become a major regional base for astronomical research and public science education, the Science and Technology Department of Tibet said.

Author:  BetaDraconis [ Mon Nov 13, 2017 2:03 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

University of Arizona is making gigantic mirrors for world's largest telescope.

http://www.azcentral.com/story/news/loc ... 840730001/

Author:  BetaDraconis [ Tue Nov 14, 2017 1:51 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Powerful new robotic camera captures stunning new image of Orion nebula

https://www.theguardian.com/science/201 ... ion-nebula

Quote:
First image from camera newly installed at the Palomar Observatory, California hints at the ‘treasure trove of discoveries’ to come from its survey of the skies.

Author:  BetaDraconis [ Sat Dec 30, 2017 8:41 am ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Is the James Webb Space Telescope "Too Big to Fail?"

https://www.scientificamerican.com/arti ... g-to-fail/

Quote:
Backers of NASA’s next great observatory contemplate its worst-case scenarios

Author:  BetaDraconis [ Thu Jan 04, 2018 1:55 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

3200 Phaethon: Arecibo Back at Work

https://www.centauri-dreams.org/?p=39078

Quote:
The(se) images of 3200 Phaethon are the best we’ve yet taken, showing a spheroidal object with a large concave depression near its equator and a dark circular feature near one of its poles. The resolution in these images is about 75 meters per pixel.


Reposted from Astronomical Events & Observing Reports in Joe Stieber's (3200) Phaethon Observed thread.

Author:  BetaDraconis [ Mon Jan 08, 2018 10:28 am ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Wanna Master the Crafty Aerodynamics of a Humongous Telescope? Call Boeing.

https://www.wired.com/story/how-boeing- ... telescope/

Quote:
When it's finished in 2022, the Giant Magellan Telescope will be the largest optical telescope on Earth. And at that size, a desert wind becomes an issue.

Author:  BetaDraconis [ Tue Jan 09, 2018 5:10 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

First ELT Main Mirror Segments Successfully Cast

http://www.astrowatch.net/2018/01/first ... ments.html

Exactly what it says on the tin.

Author:  BetaDraconis [ Mon Jan 22, 2018 8:48 am ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Is the Golden Age of Astronomy Nearly Over?

https://blogs.scientificamerican.com/ob ... arly-over/

Quote:
The high cost of "flagship" missions like the James Webb Space Telescope are keeping other crucial missions stuck on the drawing boards

Author:  BetaDraconis [ Fri Mar 16, 2018 7:44 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

How to build the largest optical telescope ever created

http://www.bbc.com/future/story/2018031 ... er-created

Author:  BetaDraconis [ Mon Jun 11, 2018 5:41 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Extremely Large, Extremely Expensive: The Race for the Next Giant Telescopes

https://www.nytimes.com/2018/06/11/scie ... costs.html

Quote:
Even as astronomers await a verdict on construction of a huge telescope on Mauna Kea, they are still trying to figure out how to pay for the next stargazing Goliaths.

Author:  BetaDraconis [ Sun Aug 26, 2018 2:40 pm ]
Post subject:  Re: European Extremely Large Telescope Size Comparison

Arecibo Observatory's Space Cats Need Your Help!

https://www.space.com/41619-arecibo-obs ... aiser.html

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