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In memory of nFA

Last post by Bigzmey « Sun Nov 24, 2024 5:38 pm
Replies: 46
by Gordon » Sat Dec 03, 2022 6:03 pm
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First post

I have some very sad news to past along.

Our top poster and long time member of both AstronomyForum.net and TheSkySearchers.com passed away November...

Last post

I just thought about him yesterday. Rest in peace nFA!
46 Replies

16383 Views

Last post by Bigzmey
Sun Nov 24, 2024 5:38 pm
Astrophysics Videos

Last post by notFritzArgelander « Mon May 30, 2022 5:39 am

by notFritzArgelander » Mon May 30, 2022 5:39 am

TEAM Comment: This stickie was suggested by nFA and we will be posting links to videos of different speakers discussing Astrophysics topics. If any...

0 Replies

3705 Views

Last post by notFritzArgelander
Mon May 30, 2022 5:39 am
perihelion, aphelion and solstices

Last post by helicon « Sun Jan 12, 2025 10:47 pm
Replies: 11
by chasmanian » Fri Jan 03, 2025 9:34 pm

First post

I was wondering why perihelion and the December solstice are not on the same day.
(same for aphelion and the June solstice.)
so I googled and found...

Last post

Very interesting thread, thanks.

11 Replies

627 Views

Last post by helicon
Sun Jan 12, 2025 10:47 pm
Earthshine

Last post by chasmanian « Mon Jan 06, 2025 3:27 pm
Replies: 26
by chasmanian » Mon Dec 09, 2024 7:44 pm
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First post

hey everyone,

I think understand something about Earthshine. would someone please tell me if I'm right?
consider this scenario. its nighttime and...

Last post

yes, I understand now.
thank you for your excellent clear explanation.
and
I see clearly now, about what you said about the light, (the photons),...
26 Replies

1950 Views

Last post by chasmanian
Mon Jan 06, 2025 3:27 pm
Unusual binary system hosts a massive fast-spinning white dwarf

Last post by helicon « Thu Jan 02, 2025 3:09 pm

by helicon » Thu Jan 02, 2025 3:09 pm

Thought this might be of interest:

0 Replies

305 Views

Last post by helicon
Thu Jan 02, 2025 3:09 pm
Dark energy 'doesn't exist'

Last post by Graeme1858 « Sun Dec 29, 2024 11:57 pm
Replies: 2
by Graeme1858 » Mon Dec 23, 2024 10:29 am

First post

This theory says that Dark Energy is an effect seen as a result of the lack of gravity in the voids between galaxy clusters and the resulting lack of...

Last post

Anybody read the novel Timescape by Gregory Benford?

Nope, but I think I will!

2 Replies

517 Views

Last post by Graeme1858
Sun Dec 29, 2024 11:57 pm
Einstein and orbits

Last post by chasmanian « Tue Dec 24, 2024 12:05 am
Replies: 10
by chasmanian » Mon Dec 23, 2024 4:15 pm

First post

hey guys, Happy Festivus,
and
I was wondering about this:

what are the Einsteinian Relativity curved space, explanations for why:

the Earth and...

Last post

I skimmed the articles quick, and while certainly the mass of the planets play into it a bit it doesn't seem to be as much as one might think. The...

10 Replies

323 Views

Last post by chasmanian
Tue Dec 24, 2024 12:05 am
Parker Solar Probe

Last post by Ylem « Sat Dec 21, 2024 4:06 pm
Replies: 11
by chasmanian » Tue Dec 17, 2024 6:02 pm

First post

enjoy, y'all:

scroll down to the end to read a little about the Parker Solar Probe,
and
then here's a longer article about it.

Last post

Looking forward to Christmas Eve, perfect time for a little Sun 🌞

11 Replies

564 Views

Last post by Ylem
Sat Dec 21, 2024 4:06 pm
The Shape of a Single Photon

Last post by helicon « Tue Nov 26, 2024 3:35 pm
Replies: 4
by Graeme1858 » Mon Nov 25, 2024 11:45 am

First post

A photo of a photon!

A new theory that explains how light and matter interact at the quantum level has enabled researchers to define for the first...

Last post

True photons can have properties of particles but also of waves. Or at least so I learned in Physics courses. The state of knowledge has clearly...

4 Replies

914 Views

Last post by helicon
Tue Nov 26, 2024 3:35 pm
saw the Sun through clouds, and thank you NFA

Last post by StarHugger « Mon Nov 25, 2024 2:23 am
Replies: 1
by chasmanian » Sun Nov 24, 2024 8:49 pm

First post

hey everyone,

I'm writing to tell you about something I saw a couple weeks ago.
I walked out the door of the community center where I swim, one...

Last post

Happy Thanksgiving Everyone Indeed!

1 Replies

409 Views

Last post by StarHugger
Mon Nov 25, 2024 2:23 am
MeerKAT Galaxy Discovery

Last post by helicon « Thu Nov 21, 2024 1:08 pm
Replies: 4
by Graeme1858 » Wed Nov 20, 2024 10:06 am

First post

New giant radio galaxy discovered with MeerKAT

An international team of astronomers has employed the MeerKAT radio telescope to investigate giant...

Last post

Amazing.

4 Replies

570 Views

Last post by helicon
Thu Nov 21, 2024 1:08 pm
New DESI data shed light on Gravity

Last post by StarHugger « Wed Nov 20, 2024 10:30 am
Replies: 1
by Graeme1858 » Wed Nov 20, 2024 10:18 am

First post

GR gives MG another pasting!

Gravity has shaped our cosmos. Its attractive influence turned tiny differences in the amount of matter present in...

Last post

Interesting, this second study and then the previous one from a while back and this team had alot of hands in too.

This field of research is...

1 Replies

358 Views

Last post by StarHugger
Wed Nov 20, 2024 10:30 am
Epic Gravity Lens Lines Up Seven-Galaxy View

Last post by StarHugger « Wed Nov 20, 2024 12:47 am
Replies: 1
by chasmanian » Tue Nov 19, 2024 9:56 pm

First post

this looks interesting from Scientific American:

Last post

Awesome lens with a cool name indeed.

1 Replies

382 Views

Last post by StarHugger
Wed Nov 20, 2024 12:47 am
Trapped Rouge Binaries in Orion

Last post by Ylem « Mon Nov 18, 2024 4:19 am
Replies: 1
by StarHugger » Mon Nov 18, 2024 3:05 am

First post

I think most here have tried to split the Trapezium Stars or image Orion without blowing out it's central core, I think we all wonder in amazement...

Last post

Wow!
That's amazing!

1 Replies

375 Views

Last post by Ylem
Mon Nov 18, 2024 4:19 am
Potential Hazard from the Taurid Meteor Showers

Last post by StarHugger « Fri Nov 15, 2024 10:56 pm
Replies: 4
by Caddman » Fri Nov 15, 2024 4:41 pm

4 Replies

502 Views

Last post by StarHugger
Fri Nov 15, 2024 10:56 pm
Neutrino Fog Hurdle

Last post by Graeme1858 « Wed Nov 13, 2024 9:14 am

by Graeme1858 » Wed Nov 13, 2024 9:14 am

Italian and Chinese physicists discover new neutrino problem.

As if searching for dark matter isn't difficult enough already, physicists may have...

0 Replies

374 Views

Last post by Graeme1858
Wed Nov 13, 2024 9:14 am
New report details what happened to the Arecibo Observatory

Last post by StarHugger « Mon Nov 11, 2024 9:24 pm
Replies: 3
by helicon » Thu Nov 07, 2024 1:03 pm

First post

Made famous by the film Contact

Last post

Very interesting, alot of stresses playing on that structure. When I used to tower climb back in the day our 550' tower anchorments where always...

3 Replies

502 Views

Last post by StarHugger
Mon Nov 11, 2024 9:24 pm
Ion Engines

Last post by ThinkerX « Sat Nov 02, 2024 7:30 am
Replies: 1
by Graeme1858 » Mon Oct 28, 2024 8:07 am

First post

Sending an object to another star is still the stuff of science fiction. But some concrete missions could get us at least part way there. These...

Last post

I attempted to run the numbers on something like this a few years ago - but much of it was a 'best guess' because of missing data. If memory serves...

1 Replies

687 Views

Last post by ThinkerX
Sat Nov 02, 2024 7:30 am
Milky Way SMBH My be Elongated.

Last post by StarHugger « Sun Oct 27, 2024 6:43 pm
Replies: 2
by Graeme1858 » Sun Oct 27, 2024 4:52 pm

First post

Radio image of Sagittarius A* in the centre of the Milky Way galaxy, obtained from re-analysis by new research. The structure is elongated from east...

Last post

Interesting article, we are indeed getting closer to better accuracy in imaging black holes.

2 Replies

578 Views

Last post by StarHugger
Sun Oct 27, 2024 6:43 pm
Record gamma rays detected at Milky Way's core

Last post by Graeme1858 « Wed Oct 23, 2024 1:49 pm

by Graeme1858 » Wed Oct 23, 2024 1:49 pm

It would seem the core of our galaxy is even more violent than we knew!

At the High-Altitude Water Cherenkov (HAWC) observatory, 13,000 feet above...

0 Replies

480 Views

Last post by Graeme1858
Wed Oct 23, 2024 1:49 pm
Ultralight Dark Matter

Last post by Graeme1858 « Tue Oct 22, 2024 8:59 am

by Graeme1858 » Tue Oct 22, 2024 8:59 am

Ultralight dark matter helps to understand Gravitational Wave energy loss.

A recent study in Physical Review Letters explores the effects of...

0 Replies

476 Views

Last post by Graeme1858
Tue Oct 22, 2024 8:59 am
Clouds of Axions Shroud Neutron Stars

Last post by Graeme1858 « Mon Oct 21, 2024 11:39 am

by Graeme1858 » Mon Oct 21, 2024 11:39 am

A team of physicists from the universities of Amsterdam, Princeton and Oxford have shown that extremely light particles known as axions may occur in...

0 Replies

461 Views

Last post by Graeme1858
Mon Oct 21, 2024 11:39 am
A "Steam World"

Last post by Mike Q « Sat Oct 19, 2024 9:29 pm
Replies: 4
by AntennaGuy » Sun Oct 13, 2024 3:59 pm

First post

Headline: Nearby exoplanet is a 1st-of-its-kind 'steam world,’ James Webb Space Telescope finds.

This world, designated GJ 9827 d, is around twice...

Last post

Well since all the good words have been used already, i will just say... Cool

4 Replies

635 Views

Last post by Mike Q
Sat Oct 19, 2024 9:29 pm
Quantum Processes in Spacetime

Last post by Graeme1858 « Thu Oct 17, 2024 9:37 am

by Graeme1858 » Thu Oct 17, 2024 9:37 am

Quantum Physics and Special Relativity take a step closer to each other.

New theoretical framework sets limits for the realization of quantum...

0 Replies

453 Views

Last post by Graeme1858
Thu Oct 17, 2024 9:37 am
New physics needed?

Last post by Mike Q « Mon Sep 30, 2024 3:43 pm
Replies: 2
by Graeme1858 » Mon Sep 30, 2024 11:49 am

First post

Seems it's more clumpy out there than it should be:

Last post

I am afraid the universe ia going to keep us guessing

2 Replies

561 Views

Last post by Mike Q
Mon Sep 30, 2024 3:43 pm

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