|
|
02-28-2020, 05:30 AM
|
#41
|
Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
|
otoh, it seems like there's plenty of Hawaiian's who are /for/ the TMT project...
Documents - Maunakea & TMT
|
|
|
02-28-2020, 06:56 AM
|
#42
|
Senior Member
Join Date: Dec 2013
Location: Lancaster, Pennsylvania
Trailer: E 21 2019 Tow Vehicle: 2019 4Runner Limited
Posts: 740
|
Quote:
Originally Posted by John in Santa Cruz
|
The polls which were taken at the end of this report suggest there is overwhelming support for astronomy on the Big Island. As far as the economic impact goes -- which was not covered in this study, there are lots of articles including this one from Hawaii Tribune Herald. It is an 'opinion piece' of course but the facts parallel all of the other articles which came up in a search. One of things I learned was that a deadly tsunami slammed into Hawaii back in 1960. Hilo, the coastal city nearest to Mauna Kea was practically destroyed. The economy on the Big Island was devastated. Construction of the first observatories helped jump start the economy.
|
|
|
02-28-2020, 09:01 AM
|
#43
|
Senior Member
Join Date: Mar 2013
Location: n/a, Texas
Trailer: Escape
Posts: 729
|
https://www.wired.com/story/inside-s...t-kept-secret/
Hawaii is saying “no” to locating a big, satellite launching, centrifuge in the state. The machine will be designed to throw a 100 kg satellite/booster to 200,000 ft altitude then the booster will move it into orbit. They hope to put up 5 satellites a day, every day. We will be able to use excellent cell phone service to say goodby to the telescopic night sky.
|
|
|
02-28-2020, 11:04 AM
|
#44
|
Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
|
Quote:
Originally Posted by Telescopist
The LSST/Vera C. Rubin 8.4 meter primary mirror successfully cast 2008. From planning stage to first light some of these giant telescopes take over 15 years to complete.
|
Wow, great photo! Where was the mirror cast, do you know?
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
|
|
|
02-28-2020, 11:16 AM
|
#45
|
Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
|
Quote:
Originally Posted by Telescopist
One of things I learned was that a deadly tsunami slammed into Hawaii back in 1960. Hilo, the coastal city nearest to Mauna Kea was practically destroyed. The economy on the Big Island was devastated. Construction of the first observatories helped jump start the economy.
|
I had an uncle who owned a car dealership in Hilo. His business was literally wiped out by this event.
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
|
|
|
02-28-2020, 11:18 AM
|
#46
|
Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
|
Quote:
Originally Posted by Viajante
https://www.wired.com/story/inside-s...t-kept-secret/
Hawaii is saying “no” to locating a big, satellite launching, centrifuge in the state. The machine will be designed to throw a 100 kg satellite/booster to 200,000 ft altitude then the booster will move it into orbit. They hope to put up 5 satellites a day, every day. We will be able to use excellent cell phone service to say goodby to the telescopic night sky.
|
What a bizarre story. It seems like a rail gun on the side of a mountain would be easier to build and use.
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
|
|
|
02-28-2020, 04:09 PM
|
#47
|
Senior Member
Join Date: Dec 2013
Location: Lancaster, Pennsylvania
Trailer: E 21 2019 Tow Vehicle: 2019 4Runner Limited
Posts: 740
|
Quote:
Originally Posted by Mike Lewis
Wow, great photo! Where was the mirror cast, do you know?
|
SLAC National Accelerator Laboratory. On the Stanford Univ. campus.
|
|
|
02-28-2020, 04:33 PM
|
#48
|
Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
|
Quote:
Originally Posted by Telescopist
SLAC National Accelerator Laboratory. On the Stanford Univ. campus.
|
I thought U of Arizona did the mirror for the LSST ?
here's the dual mirror being polished... note there's two different curves in one piece of glass. Mirror "M1" is the outer half of the radius, and mirror "M3" is on the inside.
to better explain this, see this diagram... there's 3 mirrors, the light bounces off the 8.4 meter M1 (outer ring of bottom mirror) then the 3.4 m M2 (on top) then the 5 m M3 (inner of bottom mirror assembly), then hits the giant camera assembly in the middle, where it goes through 3 correcting lenses that are around 1 meter across before hitting the worlds largest camera. There's also a filter assembly that can put any one of 4 different filters in front of the monochrome camera.
camera specifics:
|
|
|
02-28-2020, 06:20 PM
|
#49
|
Senior Member
Join Date: Dec 2013
Location: Lancaster, Pennsylvania
Trailer: E 21 2019 Tow Vehicle: 2019 4Runner Limited
Posts: 740
|
You got it. The camera was made in Stanford.
|
|
|
02-28-2020, 06:50 PM
|
#50
|
Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
|
Quote:
Originally Posted by Telescopist
You got it. The camera was made in Stanford.
|
one of the lead LSST project designers came and gave a talk to my astronomy club a couple years ago, went into quite a lot of detail on the camera design and construction. very cool stuff.
|
|
|
02-28-2020, 09:27 PM
|
#51
|
Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
|
I missed a chance to tour U. of Arizona's Mirror Lab back in the mid-1980s. But several years later I was able to tour SLAC. It's really worth seeing. Those particle detectors look like they are five stories tall.
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
|
|
|
02-29-2020, 01:54 AM
|
#52
|
Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
|
a guy in my Astronomy club is a recently retired physicist, worked at SLAC for many years. has some great stories about the "Klystron gallery" with those 2 story tall vacuum tubes that power SLAC.
|
|
|
02-29-2020, 07:39 AM
|
#53
|
Senior Member
Join Date: Dec 2013
Location: Lancaster, Pennsylvania
Trailer: E 21 2019 Tow Vehicle: 2019 4Runner Limited
Posts: 740
|
Quote:
Originally Posted by John in Santa Cruz
one of the lead LSST project designers came and gave a talk to my astronomy club a couple years ago, went into quite a lot of detail on the camera design and construction. very cool stuff.
|
!
|
|
|
02-29-2020, 07:53 AM
|
#54
|
Senior Member
Join Date: Dec 2013
Location: Lancaster, Pennsylvania
Trailer: E 21 2019 Tow Vehicle: 2019 4Runner Limited
Posts: 740
|
Quote:
Originally Posted by John in Santa Cruz
one of the lead LSST project designers came and gave a talk to my astronomy club a couple years ago, went into quite a lot of detail on the camera design and construction. very cool stuff.
|
of the science which will be done and the telescope. Amazing technological feat.
|
|
|
08-10-2020, 07:29 AM
|
#55
|
Senior Member
Join Date: Feb 2013
Location: Santa Rosa County, Florida
Trailer: 2014 Escape 21 Tow: 2024 Toyota Tundra
Posts: 3,105
|
Hearth your thrusters
Here is a new article about the satellite problem. I'm posting the link partly because of the article's oddness to a North American reader. I'm guessing the publication is Indian, but I don't know:
https://www.rjrempires.com/amazon-sa...the-night-sky/
__________________
Mike Lewis
She don't lie, she don't lie, she don't lie-- propane
Photos and travelogues here: mikelewisimages.com
|
|
|
08-10-2020, 12:26 PM
|
#56
|
Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
|
Quote:
Originally Posted by Mike Lewis
|
yeah, every article on that site is by one RAHUL NAMASUDRA, and near as I can tell its New Dehli based.
|
|
|
02-05-2021, 06:08 PM
|
#57
|
Junior Member
Join Date: Oct 2020
Location: Victoria, Texas
Trailer: 2020 Escape
Posts: 9
|
Ok guys,
Need help. So y’all are experienced stargazers. I have my new escape and will be going to some dark sky’s sites and others which will be star worthy. I don’t want to invest in something worth 1000.00+.
Is there any amateurs scopes less than 500.00 worth buying. If so I would appreciate the help.
Not star clueless as i’am fair at celestial navigation or used to be. Hats totally different than gazing for fun.
Thank you,
David
|
|
|
02-05-2021, 07:04 PM
|
#58
|
Senior Member
Join Date: May 2020
Location: Overbrook, Kansas
Trailer: 2021 E19 (Padawan)
Posts: 1,979
|
6 inch Dobsonian from someone like Orion with a cheap collimating tool and 2 or three decent eyepieces. If you are not afraid of used, Cloudy Nights is a good website. I picked up my 10” Orion Intelliscope Dobsonian that way to have something quick to set up. If looking at a refractor, due to collimating, there are some fair inexpensive 4 inch models. Orion and Skywatcher are a good place to start for lower cost scopes better than junk. A good pair of binoculars are also a good starting point. I’ve bought a lot of stuff from a company called Astronomics. Most people like them, a few don’t. They also run Cloudy Nights.
__________________
Randy & Barb
1998 C 2500 (Cruncher) and 2021 Ranger (Yoda)
|
|
|
02-05-2021, 09:15 PM
|
#59
|
Site Team
Join Date: Dec 2017
Location: Mid Left Coast, California
Trailer: 2014 Escape 21
Posts: 5,155
|
I'd suggest an 8" Orion Classic ... that extra 2" of aperture over the 6" brings you nearly double the light gathering power, and makes for much better views of the 'dim fuzzies' that most deep space objects resolve to. The XT8 Classic is about $400 new.
|
|
|
02-05-2021, 09:21 PM
|
#60
|
Senior Member
Join Date: May 2020
Location: Overbrook, Kansas
Trailer: 2021 E19 (Padawan)
Posts: 1,979
|
I thought about the 8, but would still need some accessories to fit under $500.
__________________
Randy & Barb
1998 C 2500 (Cruncher) and 2021 Ranger (Yoda)
|
|
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|