Search found 32 matches
- Sat Jan 13, 2024 5:27 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Circling the Sun (2024 Jan 13)
- Replies: 28
- Views: 26697
Re: APOD: Circling the Sun (2024 Jan 13)
22° is not the diameter, it is the radius : https://en.wikipedia.org/wiki/22%C2%B0_halo (https://fr.wikipedia.org/wiki/Halo_de_22%C2%B0)
- Thu May 25, 2023 6:26 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Cat's Eye Wide and Deep (2023 May 25)
- Replies: 16
- Views: 3149
Re: APOD: Cat's Eye Wide and Deep (2023 May 25)
The distance of NGC 6552 is about 116 Mpc (http://ned.ipac.caltech.edu/byname?objname=NGC+6552&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1) and the one of the Cat Eye is at least 1365 pc (http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%4011673229&Name=NGC++6543&...
- Sun Mar 05, 2023 5:46 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Jupiter and Venus over Italy (2023 Mar 05)
- Replies: 8
- Views: 1940
Re: APOD: Jupiter and Venus over Italy (2023 Mar 05)
there is another bright spots near the horizon. Someone knows what it is?
- Wed Nov 02, 2022 6:22 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Partial Eclipse of an Active Sun (2022 Nov 02)
- Replies: 8
- Views: 2841
Re: APOD: A Partial Eclipse of an Active Sun (2022 Nov 02)
I think we can also observe the flickering of the granules of the photosphere.
- Thu Nov 18, 2021 5:32 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Full Moonlight (2021 Nov 18)
- Replies: 7
- Views: 2629
Re: APOD: Full Moonlight (2021 Nov 18)
Yhis eclipse coincides this year with the Thai festival of Loi Krathong, the 12th fullmoon of the year.
- Sat Sep 19, 2020 5:05 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Orion in Depth (2020 Sep 19)
- Replies: 18
- Views: 3987
Distance???
Distance on the illustration does not fit those of Hipparcos. The parallax of Alnilam on the catalog is 2,43 (under the entry 26311). This parallaxe correspond to a distance of (1/0.00243) pc = 411 pc or about 1350 light-year, not 1976 ly.
- Mon Jun 08, 2020 7:07 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Atmospheric Ring of Venus (2020 Jun 08)
- Replies: 32
- Views: 14699
Re: APOD: Atmospheric Ring of Venus (2020 Jun 08)
A ring around Mercury? Really? How is that possible? There is no thick atmosphere on this planet.
- Sat May 23, 2020 7:27 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Ghost Fungus to Magellanic Cloud (2020 May 23)
- Replies: 18
- Views: 5795
Re: APOD: Ghost Fungus to Magellanic Cloud (2020 May 23)
And what about the other fuzzy faint apparition we see throw the tree? The Small Magellanic Cloud?
- Fri Feb 21, 2020 6:54 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: LDN 1622: Dark Nebula in Orion (2020 Feb 21)
- Replies: 5
- Views: 2525
Re: APOD: LDN 1622: Dark Nebula in Orion (2020 Feb 21)
All the sources consulted mention a distance of 400 to 500 light years, as well as previous APOD publications. We would like to know where this new distance comes from.
- Mon Feb 10, 2020 6:42 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Solar Eclipse over the UAE (2020 Feb 10)
- Replies: 12
- Views: 5366
Re: APOD: Solar Eclipse over the UAE (2020 Feb 10)
Like many people, APOD dont know the difference between a camel (two bumps) and a dromedary (one bump).
- Mon Jul 15, 2019 6:05 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: The Space Station Crosses a Spotless Sun (2019 Jul 15)
- Replies: 19
- Views: 7704
Re: APOD: The Space Station Crosses a Spotless Sun (2019 Jul 15)
ISS looks like the Canadian flag on this picture!
- Fri Apr 05, 2019 8:55 am
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Pan-STARRS Across the Sky (2019 Apr 05)
- Replies: 18
- Views: 7444
Re: APOD: Pan-STARRS Across the Sky (2019 Apr 05)
Maui is at a latitude of 20° or so. The limit declination is (20°-90°) = -70, not -30. Error in the text or is it the limit declination of the telescope?
- Wed Oct 10, 2018 12:37 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Sun Dance (2018 Oct 10)
- Replies: 14
- Views: 3272
Re: APOD: Sun Dance (2018 Oct 10)
SoHO is in orbit around the Sun, but not SDO who is in geosynchrone orbit ...(https://en.wikipedia.org/wiki/Solar_Dyn ... tory#Orbit)
- Tue Aug 21, 2018 2:43 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Glowing Elements in the Soul Nebula (2018 Aug 21)
- Replies: 8
- Views: 2444
Re: APOD: Glowing Elements in the Soul Nebula (2018 Aug 21)
Soul nebula is IC 1848, not IC 1898 (https://en.wikipedia.org/wiki/Westerhout_5)
- Tue Oct 03, 2017 8:43 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Layers of a Total Solar Eclipse (2017 Sep 27)
- Replies: 8
- Views: 5059
Re: APOD: Layers of a Total Solar Eclipse (2017 Sep 27)
SoHO is not a Earth-orbiting satellite. In fact the observatory is orbiting around Lagrangian L1 point and the Sun (https://www.youtube.com/watch?v=cGm-nrgAIzM).
- Fri Jul 21, 2017 4:57 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Phobos: Moon over Mars (2017 Jul 21)
- Replies: 19
- Views: 8861
Re: APOD: Phobos: Moon over Mars (2017 Jul 21)
The time interval beetween two rises of Phobos is 11h 6min, so on Mars you see 2 rises of that moon per day, rarely 3 (https://en.wikipedia.org/wiki/Phobos_(m ... cteristics)
- Wed Jun 07, 2017 2:05 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Orbiting Jupiter (2017 Jun 07)
- Replies: 38
- Views: 32308
Re: APOD: Orbiting Jupiter (2017 Jun 07)
Over the next few years ????, Juno will continue to orbit and probe Jupiter, determine atmospheric water abundance, and attempt to determine if Jupiter has a solid surface underneath these fascinating clouds. "Over the next few months" will be more appropriate i think because Juno is sched...
- Thu Mar 24, 2016 1:22 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Hickson 91 in Piscis Austrinus (2016 Mar 24)
- Replies: 27
- Views: 6802
Re: APOD: Hickson 91 in Piscis Austrinus (2016 Mar 24)
From the top of the image along the diagonal, the galaxies of this image are : IC 5168, NGC 7214, HCG 91d, ESO 467-13 and ESO 467-15. Thank to Aladin, but i would like to know which are HCG 91a, HCG 91b and HCG 91c. Also, how many galaxies compose that group, 4 or more?
- Wed Dec 17, 2014 5:20 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Geminid Fireball over Mount Balang (2014 Dec 17)
- Replies: 11
- Views: 21353
Re: APOD: Geminid Fireball over Mount Balang (2014 Dec 17)
What is the bright beacon on the far left, Jupiter or the Moon?
- Tue Jan 21, 2014 10:05 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Micro Moon over Super Moon (2014 Jan 21)
- Replies: 53
- Views: 11481
Re: APOD: Micro Moon over Super Moon (2014 Jan 21)
According to the moon's data of the nssdc (http://nssdc.gsfc.nasa.gov/planetary/factsheet/moonfact.html), it's distance at perigee is 363300 km, not the 356790 km reported on Anthony Ayiomamitis's web site. Since the moon at apogee is at 405500 km from earth, I think the difference between these pos...
- Tue Nov 05, 2013 2:39 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Kepler 78b: Earth Sized Planet... (2013 Nov 05)
- Replies: 190
- Views: 132224
Re: APOD: Kepler 78b: Earth Sized Planet... (2013 Nov 05)
Kepler is orbiting around the Sun, not around the Earth : see FAQ http://kepler.nasa.gov/Mission/faq/ E3
- Tue Jun 04, 2013 8:03 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Earths Richat Structure (2013 May 19)
- Replies: 40
- Views: 11440
Re: APOD: Earths Richat Structure (2013 May 19)
In fact, this structure is an ancien volcano. If you understand french, check this Radio Canada emission : http://www.youtube.com/watch?v=pTTnYRaZ55A
- Tue May 15, 2012 2:11 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: All the Water on Planet Earth (2012 May 15)
- Replies: 56
- Views: 322791
Re: APOD: All the Water on Planet Earth (2012 May 15)
The mean radius of Rhea is greater then 750 km (http://nssdc.gsfc.nasa.gov/planetary/fa ... tfact.html) . The radius of the water sphere is smaller compare to that moon.
- Tue Apr 10, 2012 2:15 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: A Fox Fur, a Unicorn, and a Tree... (2012 Apr 10)
- Replies: 23
- Views: 5844
Re: APOD: A Fox Fur, a Unicorn, and a Tree... (2012 Apr 10)
Comments on the positions would be accurate if the image was inverted from top to bottom.
- Sat Mar 13, 2010 7:10 pm
- Forum: The Bridge: Discuss an Astronomy Picture of the Day
- Topic: APOD: Centaurus A (2010 Mar 13)
- Replies: 14
- Views: 2848
Re: APOD: Centaurus A (2010 Mar 13)
According to SED's (http://seds.org/messier/Xtra/ngc/n5128.html), Centaurus A is a lenticular galaxy.