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Geometric DNA by Gerald Kelleher
The structure does not originate with me hence my reluctance over the past 30 years to show it and especially among a hostile or uninterested bunch of people...
March 24th 18 09:37 AM
by Gerald Kelleher Go to last post
0 170
The Equinox defined by Gerald Kelleher
Even in geocentric terms the Equinox is a special day with two distinct types of sunrises and sunsets. The Sun will come into view for the one and only time...
March 21st 18 04:02 PM
by Gerald Kelleher Go to last post
7 210
RIP, Stephen Hawking by palsing[_2_]
A brilliant life has finally come to an end at age 76. We are very lucky to have had him for so long. \Paul A
(Multi-page thread 1 2 3)
March 21st 18 01:55 PM
by Chris.B[_3_] Go to last post
25 362
A rotating Earth with a proper inclination by Gerald Kelleher
https://en.wikipedia.org/wiki/Deep_Space_Climate_Observatory#/media/File:EpicEarth-Globespin-tilt-23.4.gif By right the rotation relative to the orbital plane...
March 18th 18 08:18 PM
by Gerald Kelleher Go to last post
2 214
The photographic medium Joe Public isn't allowed to buy by RichA[_6_]
Neutron imaging!! https://en.wikipedia.org/wiki/Neutron_imaging However, Muon imagers may at some point be available, they are used now to x-ray vehicles...
March 18th 18 03:13 PM
by Chris L Peterson Go to last post
5 165
Sub-Auroral Ion Drifts discovered to cause unusual purple aurora by Quadibloc
I ran across this news item: https://phys.org/news/2018-03-mystery-purple-sky-citizen-scientists.html John Savard
March 18th 18 10:01 AM
by Paul Schlyter[_3_] Go to last post
6 196
Increasing exposure to space radiation means manned-flight = onlyProject Orion will work by RichA[_6_]
It's the only craft that can life enough weight to provide shielding for astronauts. https://phys.org/news/2018-03-space-increasingly-hazardous.html
March 16th 18 02:40 PM
by Chris L Peterson Go to last post
2 157
That is one insane astro camera! by RichA[_6_]
https://www.lsst.org/about 10,500mm f/1.25, 3GP sensor array and a 27ft diameter mirror. Able to scan its whole sky in...3 nights?!
March 16th 18 01:54 PM
by StarDust Go to last post
7 207
Equinox image 2018 by Gerald Kelleher
https://epic.gsfc.nasa.gov/ For whatever reason known only to themselves, NASA has decided not to represent the images of the Earth with a constant 23 1/2...
March 10th 18 08:51 AM
by Gerald Kelleher Go to last post
1 193
Webb cost climbing over $8 billion from $1 billion estimate. delays imminent by RichA[_6_]
http://www.skyandtelescope.com/astronomy-news/james-webb-space-telescope-additional-delays-likely/
March 7th 18 08:56 AM
by Chris.B[_3_] Go to last post
5 223
Real astronomical challenges by Gerald Kelleher
The partitioning of direct/retrogrades by perspective is immediately apparent in terms of the illusory loops of the slower moving outer planets and the actual...
(Multi-page thread 1 2 3)
March 2nd 18 07:21 PM
by Quadibloc Go to last post
21 341
Polar astronomy revisited by Gerald Kelleher
On Friday, March 2, 2018 at 8:32:00 AM UTC, Gerald Kelleher wrote: https://www.youtube.com/watch?v=MdFrE7hWj0A The animation is notable for a number of...
March 2nd 18 12:06 PM
by [email protected] Go to last post
1 169
Polar astronomy revisited by Gerald Kelleher
https://www.youtube.com/watch?v=MdFrE7hWj0A The animation is notable for a number of reasons however , in this case, it is applied to observing at the...
March 2nd 18 09:31 AM
by Gerald Kelleher Go to last post
0 168
NASA's biggest worry right now: What if something goes wrong with the Webb telescope? by Davoud[_1_]
Chris.B: How does an impoverished country, so deeply in debt, like the USA, manage such costly exercises? Impoverished? Really? I should get out...
(Multi-page thread 1 2 3 ... Last Page)
March 2nd 18 08:37 AM
by Chris.B[_3_] Go to last post
170 826
Polar evening by Gerald Kelleher
https://www.usap.gov/videoclipsandmaps/spwebcam.cfm In about a month, the forward motion of the Earth through space will turn the South pole through the...
February 28th 18 09:28 AM
by Gerald Kelleher Go to last post
4 211
Webb images are not going to be like Hubble's. It'll be basically monochromatic by RichA[_6_]
It's an infra-red telescope. It will image from orangish to IR, no yellow, no green, blue or violet light. It's mirrors are gold-plated, so the visual images...
(Multi-page thread 1 2)
February 23rd 18 07:27 PM
by Chris L Peterson Go to last post
12 272
Amateur sees supernova at first light by RichA[_6_]
https://phys.org/news/2018-02-amateur-astronomer-captures-rare-massive.html
February 23rd 18 08:45 AM
by RichA[_6_] Go to last post
0 189
Supernova research by Gerald Kelleher
http://www.latimes.com/science/sciencenow/la-sci-sn-supernova-birth-camera-20180221-story.html Rather than consider certain supernova as the death of a star,...
February 22nd 18 09:52 AM
by Gerald Kelleher Go to last post
0 162
Gravitational lenses. I don't think this was ever followed-up on by RichA[_6_]
I saw this in a 1966 Sky & Tel. Since it happened in 1988, the event proceeded existing proof of lensing, but his would have been "real-time" and not just a...
February 20th 18 05:16 AM
by Gerald Kelleher Go to last post
1 196
Earth and moon from space by Gerald Kelleher
https://www.sciencealert.com/images/2018-02/earth-moon_navcam1.jpg Lovely to appreciate as an astronomer within context of the motions of planets and moons in...
February 19th 18 06:39 PM
by Gerald Kelleher Go to last post
0 167
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