Astrophysics

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An Online Class in Astrophysics

Last post by Cathy Grimes « Sun Apr 11, 2021 11:04 pm
Replies: 3
by mikemarotta » Sat Mar 13, 2021 3:27 am

3 Replies

352 Views

Last post by Cathy Grimes
Sun Apr 11, 2021 11:04 pm
Early supermassive black hole discovered

Last post by Eva Braun « Tue Apr 06, 2021 6:44 am
Replies: 1
by brian livesey » Sat Oct 03, 2020 6:49 pm

1 Replies

1029 Views

Last post by Eva Braun
Tue Apr 06, 2021 6:44 am
Another Interstellar Visitor Is Headed Our Way

Last post by brian livesey « Mon Apr 05, 2021 9:08 pm
Replies: 2
by Brian » Thu Sep 12, 2019 4:48 pm

2 Replies

1441 Views

Last post by brian livesey
Mon Apr 05, 2021 9:08 pm
Most distant gamma ray burst

Last post by Eva Braun « Fri Apr 02, 2021 5:36 am
Replies: 1
by brian livesey » Wed Dec 16, 2020 4:32 pm

1 Replies

673 Views

Last post by Eva Braun
Fri Apr 02, 2021 5:36 am
Betelgeuse dimming enigma

Last post by brian livesey « Wed Mar 31, 2021 12:36 pm
Replies: 2
by brian livesey » Wed Jul 08, 2020 4:34 pm

2 Replies

843 Views

Last post by brian livesey
Wed Mar 31, 2021 12:36 pm
Lonesome planet

Last post by brian livesey « Tue Mar 30, 2021 5:48 pm
Replies: 2
by brian livesey » Fri Oct 30, 2020 6:54 pm

2 Replies

776 Views

Last post by brian livesey
Tue Mar 30, 2021 5:48 pm
Turbulent Jupiter

Last post by brian livesey « Sat Mar 20, 2021 8:51 pm

by brian livesey » Sat Mar 20, 2021 8:51 pm

0 Replies

326 Views

Last post by brian livesey
Sat Mar 20, 2021 8:51 pm
Solar Orbiter's first images of Sun

Last post by Cooper458 « Thu Mar 11, 2021 2:12 pm
Replies: 1
by brian livesey » Thu Jul 16, 2020 5:48 pm

1 Replies

767 Views

Last post by Cooper458
Thu Mar 11, 2021 2:12 pm
Remotest quasar and galaxy discoveries

Last post by Cooper458 « Thu Mar 11, 2021 11:32 am
Replies: 1
by brian livesey » Tue Mar 09, 2021 4:49 pm

1 Replies

142 Views

Last post by Cooper458
Thu Mar 11, 2021 11:32 am
Chicxulub: asteroid or sungrazer comet?

Last post by RMSteele « Thu Feb 18, 2021 12:19 pm
Replies: 4
by brian livesey » Wed Feb 17, 2021 5:45 pm

4 Replies

229 Views

Last post by RMSteele
Thu Feb 18, 2021 12:19 pm
The STEVE phenomenon

Last post by JohnM « Sun Feb 14, 2021 2:02 pm
Replies: 4
by brian livesey » Thu Nov 26, 2020 10:33 am

4 Replies

477 Views

Last post by JohnM
Sun Feb 14, 2021 2:02 pm
Amazing !

Last post by SunsetTwilight « Wed Feb 03, 2021 8:09 pm

by SunsetTwilight » Wed Feb 03, 2021 8:09 pm

0 Replies

629 Views

Last post by SunsetTwilight
Wed Feb 03, 2021 8:09 pm
Sirius shines brightly

Last post by SunsetTwilight « Sat Jan 30, 2021 7:52 pm
Replies: 2
by SunsetTwilight » Sat Jan 30, 2021 7:22 pm

2 Replies

172 Views

Last post by SunsetTwilight
Sat Jan 30, 2021 7:52 pm
Immaterialism

Last post by brian livesey « Sat Dec 19, 2020 7:28 am
Replies: 2
by brian livesey » Sun Aug 23, 2020 6:42 pm

2 Replies

982 Views

Last post by brian livesey
Sat Dec 19, 2020 7:28 am
Moriba K. Jah

Last post by mikemarotta « Sun Dec 13, 2020 5:13 pm
Replies: 2
by mikemarotta » Tue Dec 08, 2020 10:39 pm

2 Replies

246 Views

Last post by mikemarotta
Sun Dec 13, 2020 5:13 pm
Book Review:Hirshfeld's "Astronomy Activity and Laboratory Manual"

Last post by mikemarotta « Sun Dec 13, 2020 5:04 pm
Replies: 2
by mikemarotta » Tue Dec 08, 2020 2:44 pm

2 Replies

237 Views

Last post by mikemarotta
Sun Dec 13, 2020 5:04 pm
The Gaia three billion stars 3D Map

Last post by brian livesey « Fri Dec 04, 2020 5:30 pm

by brian livesey » Fri Dec 04, 2020 5:30 pm

0 Replies

877 Views

Last post by brian livesey
Fri Dec 04, 2020 5:30 pm
Cretaceous asteroid footnote

Last post by brian livesey « Fri Nov 20, 2020 4:37 pm
Replies: 2
by brian livesey » Fri Nov 20, 2020 11:44 am

2 Replies

257 Views

Last post by brian livesey
Fri Nov 20, 2020 4:37 pm
Is it a comet? ...

Last post by Brian « Wed Nov 18, 2020 5:50 pm
Replies: 1
by brian livesey » Wed Nov 18, 2020 7:35 am

1 Replies

254 Views

Last post by Brian
Wed Nov 18, 2020 5:50 pm
The ESA Ariel Space Telescope

Last post by brian livesey « Sat Nov 14, 2020 6:06 pm

by brian livesey » Sat Nov 14, 2020 6:06 pm

0 Replies

1071 Views

Last post by brian livesey
Sat Nov 14, 2020 6:06 pm
K2-141b: a bizzare exoplanet

Last post by Cliff « Thu Nov 12, 2020 7:21 pm
Replies: 1
by brian livesey » Sat Nov 07, 2020 5:23 pm

1 Replies

235 Views

Last post by Cliff
Thu Nov 12, 2020 7:21 pm
How an ice age begins and ends

Last post by brian livesey « Tue Nov 10, 2020 6:55 am
Replies: 2
by brian livesey » Sun Oct 18, 2020 11:17 am

2 Replies

283 Views

Last post by brian livesey
Tue Nov 10, 2020 6:55 am
Nobel Prize for Physics for Roger Penrose

Last post by brian livesey « Wed Oct 07, 2020 8:05 pm

by brian livesey » Wed Oct 07, 2020 8:05 pm

0 Replies

843 Views

Last post by brian livesey
Wed Oct 07, 2020 8:05 pm
The limit to look back time ..

Last post by brian livesey « Sun Oct 04, 2020 1:55 pm

by brian livesey » Sun Oct 04, 2020 1:55 pm

0 Replies

1126 Views

Last post by brian livesey
Sun Oct 04, 2020 1:55 pm
Giant planet found orbiting a white dwarf

Last post by Eva Braun « Thu Oct 01, 2020 9:49 am
Replies: 1
by brian livesey » Thu Sep 17, 2020 10:22 am

1 Replies

330 Views

Last post by Eva Braun
Thu Oct 01, 2020 9:49 am
Earth's altered atmosphere

Last post by brian livesey « Wed Sep 30, 2020 8:17 pm
Replies: 3
by brian livesey » Wed Sep 30, 2020 10:34 am

3 Replies

445 Views

Last post by brian livesey
Wed Sep 30, 2020 8:17 pm
Do white dwarfs harbor habitable "zombie" planets?

Last post by brian livesey « Tue Sep 08, 2020 8:21 pm

by brian livesey » Tue Sep 08, 2020 8:21 pm

0 Replies

1002 Views

Last post by brian livesey
Tue Sep 08, 2020 8:21 pm
Carrington-scale solar storms more frequent than previously thought

Last post by Brian « Thu Sep 03, 2020 3:53 pm
Replies: 4
by Brian » Tue Sep 01, 2020 6:16 pm

4 Replies

391 Views

Last post by Brian
Thu Sep 03, 2020 3:53 pm
Martian airglow

Last post by brian livesey « Wed Aug 26, 2020 2:54 pm

by brian livesey » Wed Aug 26, 2020 2:54 pm

0 Replies

884 Views

Last post by brian livesey
Wed Aug 26, 2020 2:54 pm
The nature of time

Last post by brian livesey « Fri Aug 21, 2020 6:41 pm

by brian livesey » Fri Aug 21, 2020 6:41 pm

0 Replies

923 Views

Last post by brian livesey
Fri Aug 21, 2020 6:41 pm
The Kinman Dwarf galaxy's missing star

Last post by brian livesey « Sun Jul 19, 2020 4:18 pm

by brian livesey » Sun Jul 19, 2020 4:18 pm

0 Replies

987 Views

Last post by brian livesey
Sun Jul 19, 2020 4:18 pm
New date set for Webb Space Telescope launch

Last post by brian livesey « Sun Jul 19, 2020 11:07 am
Replies: 2
by brian livesey » Sat Jul 18, 2020 6:25 pm

2 Replies

499 Views

Last post by brian livesey
Sun Jul 19, 2020 11:07 am
Remote ring Galaxy discovered

Last post by brian livesey « Sun Jul 12, 2020 12:51 pm

by brian livesey » Sun Jul 12, 2020 12:51 pm

0 Replies

866 Views

Last post by brian livesey
Sun Jul 12, 2020 12:51 pm
A new angle on the Cretaceous asteroid

Last post by brian livesey « Fri Jul 10, 2020 2:10 pm

by brian livesey » Fri Jul 10, 2020 2:10 pm

0 Replies

856 Views

Last post by brian livesey
Fri Jul 10, 2020 2:10 pm
global dimming the forgotten ? it should not be

Last post by skyhawk « Wed Mar 04, 2020 3:00 pm

by skyhawk » Wed Mar 04, 2020 3:00 pm

0 Replies

2496 Views

Last post by skyhawk
Wed Mar 04, 2020 3:00 pm
Sharpless-308

Last post by brian livesey « Tue Mar 03, 2020 11:41 am

by brian livesey » Tue Mar 03, 2020 11:41 am

0 Replies

2813 Views

Last post by brian livesey
Tue Mar 03, 2020 11:41 am
Superblast from the past

Last post by brian livesey « Sat Feb 29, 2020 11:04 am

by brian livesey » Sat Feb 29, 2020 11:04 am

0 Replies

2831 Views

Last post by brian livesey
Sat Feb 29, 2020 11:04 am
Betelgeuse is brightening ..

Last post by brian livesey « Sat Feb 22, 2020 10:52 am
Replies: 6
by brian livesey » Fri Feb 21, 2020 11:39 am

6 Replies

3050 Views

Last post by brian livesey
Sat Feb 22, 2020 10:52 am
Solar Orbiter

Last post by brian livesey « Wed Feb 05, 2020 10:32 am

by brian livesey » Wed Feb 05, 2020 10:32 am

0 Replies

3225 Views

Last post by brian livesey
Wed Feb 05, 2020 10:32 am
Cretaceous asteroid rethink

Last post by brian livesey « Fri Jan 17, 2020 11:07 am

by brian livesey » Fri Jan 17, 2020 11:07 am

0 Replies

3635 Views

Last post by brian livesey
Fri Jan 17, 2020 11:07 am
Asteroid Vatiras

Last post by Brian « Mon Jan 13, 2020 5:50 pm
Replies: 1
by brian livesey » Mon Jan 13, 2020 10:35 am

1 Replies

2632 Views

Last post by Brian
Mon Jan 13, 2020 5:50 pm
Earth impacts more frequent..

Last post by brian livesey « Wed Jan 08, 2020 10:44 am
Replies: 2
by brian livesey » Tue Jan 07, 2020 11:56 am

2 Replies

1542 Views

Last post by brian livesey
Wed Jan 08, 2020 10:44 am
M77

Last post by brian livesey « Tue Dec 17, 2019 12:37 pm

by brian livesey » Tue Dec 17, 2019 12:37 pm

0 Replies

1332 Views

Last post by brian livesey
Tue Dec 17, 2019 12:37 pm
Solar minimum heading for spotless record

Last post by Brian « Mon Dec 09, 2019 9:33 pm
Replies: 1
by brian livesey » Mon Dec 09, 2019 11:48 am

1 Replies

967 Views

Last post by Brian
Mon Dec 09, 2019 9:33 pm
M94

Last post by brian livesey « Mon Dec 02, 2019 10:43 am

by brian livesey » Mon Dec 02, 2019 10:43 am

0 Replies

1368 Views

Last post by brian livesey
Mon Dec 02, 2019 10:43 am
The Thirty Meter Telescope protests

Last post by Brian « Fri Nov 22, 2019 5:04 pm
Replies: 14
by brian livesey » Wed Jul 31, 2019 10:08 am

14 Replies

3110 Views

Last post by Brian
Fri Nov 22, 2019 5:04 pm
Hygiea upgrade?

Last post by brian livesey « Wed Oct 30, 2019 10:08 am

by brian livesey » Wed Oct 30, 2019 10:08 am

0 Replies

1583 Views

Last post by brian livesey
Wed Oct 30, 2019 10:08 am
Exoplanet pioneers share Nobel Prize

Last post by brian livesey « Wed Oct 09, 2019 9:34 am

by brian livesey » Wed Oct 09, 2019 9:34 am

0 Replies

1592 Views

Last post by brian livesey
Wed Oct 09, 2019 9:34 am
A pale blue exoplanet

Last post by Cliff « Fri Sep 20, 2019 5:44 pm
Replies: 4
by brian livesey » Sat Sep 14, 2019 12:25 pm

4 Replies

1641 Views

Last post by Cliff
Fri Sep 20, 2019 5:44 pm
What's an asteroid worth?

Last post by nayam « Tue Sep 03, 2019 9:50 am
Replies: 10
by brian livesey » Tue Jul 09, 2019 10:10 am

10 Replies

2538 Views

Last post by nayam
Tue Sep 03, 2019 9:50 am

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