Search found 18398 matches
- Fri Jan 14, 2022 4:48 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Supernova Remnant Simeis 147 (2022 Jan 13)
- Replies: 16
- Views: 9588
Re: APOD: Supernova Remnant Simeis 147 (2022 Jan 13)
If the explosion is 40K years old, and the light from that explosion had to travel 3K light-years to earth, then wouldn't that mean that the light from the explosion reached earth 43K years ago. I'm confused. Maybe it's just the way the author worded it. The [Earth observed] supernova remnant has a...
- Thu Jan 13, 2022 5:59 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Supernova Remnant Simeis 147 (2022 Jan 13)
- Replies: 16
- Views: 9588
Re: APOD: Supernova Remnant Simeis 147 (2022 Jan 13)
That show came to mind for me as well.Fred the Cat wrote: ↑Thu Jan 13, 2022 4:51 pm
Ann, your Flying Spaghetti Monster reminded me of last night's Nature.
It made be think that any planet with life was bound to have predators & prey
and that eventually some those predators would have to become super intelligent.
- Thu Jan 13, 2022 2:23 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Supernova Remnant Simeis 147 (2022 Jan 13)
- Replies: 16
- Views: 9588
- Thu Jan 13, 2022 1:26 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Supernova Remnant Simeis 147 (2022 Jan 13)
- Replies: 16
- Views: 9588
Re: APOD: Supernova Remnant Simeis 147 (2022 Jan 13)
Swedish meat balls are OK but I wouldn't eat An's spaghetti either.orin stepanek wrote: ↑Thu Jan 13, 2022 12:19 pm
I thought bit looked 'Icky' 'til I saw Ann's meatball & spaghetti head!
I'll never eat meat balls ans spaghetti again!
- Thu Jan 13, 2022 12:00 am
- Forum: The Communications Center: Breaking Science News
- Topic: SAO: Weekly Science Updates 2016
- Replies: 58
- Views: 13783
Re: SAO: A New Record for the Farthest Galaxy Known
GN-z11 is the oldest and most distant known galaxy yet identified in the observable universe, having a spectroscopic redshift of z=11.1 Universe age at 1+z = 12.1 was 414 Myr. GN-z11 size: 1.2 kpc (~ 0.303" at 1+z = 12.1) 1.6 μm HST resolution ~ 0.168" [ 1+z = 12.1 : gives a scale of 3.95...
- Tue Jan 11, 2022 6:47 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Orion's Belt Region in Gas and Dust (2022 Jan 11)
- Replies: 17
- Views: 6726
Re: APOD: Orion's Belt Region in Gas and Dust (2022 Jan 11)
https://upload.wikimedia.org/wikipedia/commons/thumb/4/48/Sigma_orionis_cluster.jpg/1280px-Sigma_orionis_cluster.jpg Sigma Orionis is a multiple star and the central star of an entire very young cluster containing several pre-main sequence stars. The hottest, brightest component of Sigma Orionis is...
- Tue Jan 11, 2022 3:56 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Orion's Belt Region in Gas and Dust (2022 Jan 11)
- Replies: 17
- Views: 6726
Re: APOD: Orion's Belt Region in Gas and Dust (2022 Jan 11)
https://www.youtube.com/watch?v=Z-BbpaNXbxg I'm fine with APOD exploring different imaging and visualization techniques. I most appreciate APODs when they teach, which this one does not. I'm not sure that's true. Certainly, removing the stars changes how our innate pattern recognition system operat...
- Mon Jan 10, 2022 7:20 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: James Webb Space Telescope (JWST)
- Replies: 104
- Views: 91089
Re: James Webb Space Telescope is now fully deployed
https://www.youtube.com/watch?v=JypEu99RXgY The Webb Space Telescope has transormned into its final form. Now it is on its way to Lagrange point 2. JWST has already completed about 80% of the way. https://twitter.com/NASAWebb/status/1479880178021060609?s=20 Just a quick reminder: the main goal of J...
- Sun Jan 09, 2022 6:29 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Hubble's Jupiter and the Shrinking... (2022 Jan 09)
- Replies: 26
- Views: 6595
Re: APOD: Hubble's Jupiter and the Shrinking... (2022 Jan 09)
NASA’s James Webb Space Telescope to Target Jupiter’s Great Red Spot Jun 25, 2018, Solar System and Beyond <<NASA’s James Webb Space Telescope, the most ambitious and complex space observatory ever built, will use its unparalleled infrared capabilities to study Jupiter’s Great Red Spot, shedding ne...
- Sat Jan 08, 2022 3:56 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Quadrantids of the North (2022 Jan 08)
- Replies: 9
- Views: 3426
Re: APOD: Quadrantids of the North (2022 Jan 08)
Confusing why a constellation gets dropped? :shock: Originally, the constellations were basically just asterisms and loosely defined areas around them. 100 years ago the constellations were formalized by rectilinear boundaries (that is, the constellations are not the asterisms anymore). And Quadran...
- Sat Jan 08, 2022 2:59 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: James Webb Space Telescope (JWST)
- Replies: 104
- Views: 91089
James Webb Space Telescope: Primary Mirror Deployment – Mission Control Live
Click to play embedded YouTube video.
- Fri Jan 07, 2022 7:48 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: JWST on the Road to L2 (2021 Dec 31)
- Replies: 27
- Views: 7664
Re: APOD: JWST on the Road to L2 (2021 Dec 31)
I was wondering about something: if either or both of the two "wings" of the main mirror failed to unfold into position, could the telescope still do some imaging and provide useful data? After all, there would still be at least 12 of the 18 total hexagonal mirror segments in place. I wou...
- Fri Jan 07, 2022 7:36 pm
- Forum: The Asterisk Café: Discuss Anything Astronomy Related
- Topic: Better Call Saul
- Replies: 0
- Views: 3361
Better Call Saul
Click to play embedded YouTube video.
- Fri Jan 07, 2022 3:32 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Year of Sunrises (2022 Jan 05)
- Replies: 12
- Views: 6499
Re: APOD: A Year of Sunrises (2022 Jan 05)
An emailer points out The sun most certainly does not rise at its southernmost point (N hemisphere) on the solstice. That happens around January 5, +/-. (today!) This is correct insofar as the Sun's southernmost point occurs during the day of the December solstice -- which does not necessarily coin...
- Fri Jan 07, 2022 2:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: JWST on the Road to L2 (2021 Dec 31)
- Replies: 27
- Views: 7664
Re: APOD: JWST on the Road to L2 (2021 Dec 31)
https://www.youtube.com/watch?v=lOCDwpkcLuQ <<NASA will provide live coverage and host a media briefing Saturday, Jan. 8, for the conclusion of the James Webb Space Telescope’s major spacecraft deployments. Beginning no earlier than 9 a.m. EST, NASA will air live coverage of the final hours of Webb...
- Fri Jan 07, 2022 2:13 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Ecstatic Solar Eclipse (2022 Jan 07)
- Replies: 5
- Views: 2460
Re: APOD: Ecstatic Solar Eclipse (2022 Jan 07)
<<Stories about the unusual behavior of birds during eclipses have been told for centuries, but bird reactions were recorded and studied systematically by citizen scientists participating in an eBird project during the total solar eclipse that crossed the USA in 2017 August. Although some unusual b...
- Thu Jan 06, 2022 8:03 pm
- Forum: The Library: Information Desk and Educational Resources
- Topic: Ebb and flow
- Replies: 2
- Views: 23277
Re: Ebb and flow
https://upload.wikimedia.org/wikipedia/commons/e/eb/Tide_overview.svg I may have lost my mind, but I have no clue about how the ebb and flow work. Well, I understand that Moon attracts water, which is more elastic than the earth. Hump A on the top of Earth is formed. But how does hump B on the oppo...
- Thu Jan 06, 2022 5:36 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Last Days of Venus as the Star... (2022 Jan 06)
- Replies: 16
- Views: 4869
Re: APOD: The Last Days of Venus as the Star... (2022 Jan 06)
"about 2 percent illuminated by sunlight" sounds somewhat strange to me - it is 100% illuminated by sunlight!! I presume you mean that about 2% of the sunlight that hits it is reflected... :) I’ve always taken that sort of statement as meaning that 2% of the disk of Venus is reflecting su...
- Wed Jan 05, 2022 6:57 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: JWST on the Road to L2 (2021 Dec 31)
- Replies: 27
- Views: 7664
Re: APOD: JWST on the Road to L2 (2021 Dec 31)
https://www.youtube.com/watch?v=-EnlaXnFcGs <<Webb's secondary mirror is fully deployed. Webb's secondary mirror had to deploy in microgravity, and in extremely cold temperatures, and it ultimately had to work the first time without error. It also had to deploy, position, and lock itself into place...
- Wed Jan 05, 2022 2:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Year of Sunrises (2022 Jan 05)
- Replies: 12
- Views: 6499
Re: APOD: A Year of Sunrises (2022 Jan 05)
https://upload.wikimedia.org/wikipedia/commons/7/74/Edmonton_-_Art_Gallery_of_Alberta_%2815015846212%29.jpg <<The Art Gallery of Albertais a public art gallery located in downtown Edmonton, Alberta, Canada. The building was designed by Los Angeles architect Randall Stout. Construction of this build...
- Wed Jan 05, 2022 2:07 pm
- Forum: The Communications Center: Breaking Science News
- Topic: AAS NOVA — Research Highlights 2019
- Replies: 104
- Views: 70522
Re: Are There More Stars Like Boyajian’s Star?
Click to play embedded YouTube video.
- Wed Jan 05, 2022 3:31 am
- Forum: The Communications Center: Breaking Science News
- Topic: Two Stars' Close Encounter May Explain a Flare That Lasted 85 Years
- Replies: 1
- Views: 1316
FU Orionis
https://www.youtube.com/watch?v=fTMDpRoTLF0 <<In stellar evolution, an FU Orionis star (also FU Orionis object, or FUor) is a pre–main-sequence star which displays an extreme change in magnitude and spectral type. One example is the star V1057 Cyg, which became 6 magnitudes brighter and went from s...
- Wed Jan 05, 2022 2:15 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Moons Beyond Rings at Saturn (2022 Jan 04)
- Replies: 10
- Views: 3835
Re: APOD: Moons Beyond Rings at Saturn (2022 Jan 04)
I can't imagine any human will EVER visit Saturn, or even Jupiter for that matter - radiation and particles are killers, and what would humans do there anyway? Great place to go for a sightseeing tour... although the trip out and back is rough! National Lampoon's Europaean Vacation: <<Dr. Unger (Em...
- Wed Jan 05, 2022 1:36 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: JWST on the Road to L2 (2021 Dec 31)
- Replies: 27
- Views: 7664
Re: APOD: JWST on the Road to L2 (2021 Dec 31)
Sunshield Successfully Deploys on NASA’s Next Flagship Telescope <<On Jan. 4, 2022, engineers successfully completed the deployment of the James Webb Space Telescope’s sunshield, seen here during its final deployment test on Earth in December 2020 at Northrop Grumman in Redondo Beach, California. T...
- Mon Jan 03, 2022 6:52 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Comet Leonard's Long Tail (2022 Jan 03)
- Replies: 10
- Views: 3557
Re: APOD: Comet Leonard's Long Tail (2022 Jan 03)
The ion tail is affected by the solar wind, magnetic fields & coronal mass ejections.Sundown wrote: ↑Mon Jan 03, 2022 6:02 pm
I was just wondering why, if there is no air in space to move around or dissipate it (like a contrail),
is the tail not straight for all those miles? Is it because of Solar Wind?