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SWaB: New Horizons improves parallaxes

Last post by Thefatkitty « Sat Mar 28, 2020 8:39 pm
Replies: 8
by notFritzArgelander » Fri Mar 27, 2020 4:06 pm

First post

A surprisingly good side effect of NH observations.

Last post

Very cool; great idea and article nFA :D The best part was I understood the whole thing! :lol:

All the best,

8 Replies

58 Views

Last post by Thefatkitty
Sat Mar 28, 2020 8:39 pm
space activities from home

Last post by Michael131313 « Sat Mar 28, 2020 6:11 pm
Replies: 2
by notFritzArgelander » Thu Mar 26, 2020 7:16 pm

2 Replies

49 Views

Last post by Michael131313
Sat Mar 28, 2020 6:11 pm
SWaB: how can a nuclear weapon be hotter than Sun's core

Last post by helicon « Sat Mar 28, 2020 3:45 pm
Replies: 1
by notFritzArgelander » Sat Mar 28, 2020 12:37 pm

1 Replies

25 Views

Last post by helicon
Sat Mar 28, 2020 3:45 pm
LLNL validates asteroid deflection code

Last post by notFritzArgelander « Fri Mar 27, 2020 11:48 pm
Replies: 2
by notFritzArgelander » Fri Mar 27, 2020 9:17 pm

2 Replies

35 Views

Last post by notFritzArgelander
Fri Mar 27, 2020 11:48 pm
old Voyager data show Uranus had a plasmoid

Last post by helicon « Fri Mar 27, 2020 7:23 pm
Replies: 1
by notFritzArgelander » Fri Mar 27, 2020 4:29 pm

1 Replies

27 Views

Last post by helicon
Fri Mar 27, 2020 7:23 pm
AAS: NS binaries and repeating FRBs

Last post by notFritzArgelander « Fri Mar 27, 2020 6:23 pm

by notFritzArgelander » Fri Mar 27, 2020 6:23 pm

0 Replies

15 Views

Last post by notFritzArgelander
Fri Mar 27, 2020 6:23 pm
ALMA shows gas impacted by jets of SMBH

Last post by notFritzArgelander « Fri Mar 27, 2020 4:31 pm

by notFritzArgelander » Fri Mar 27, 2020 4:31 pm

0 Replies

14 Views

Last post by notFritzArgelander
Fri Mar 27, 2020 4:31 pm
another new Live Astronomy Q and A

Last post by chasmanian « Fri Mar 27, 2020 3:14 am
Replies: 3
by chasmanian » Wed Mar 25, 2020 3:35 am

First post

LIVE Astronomy question and answer session with Professor Chris Impey from Steward Observatory at the University of Arizona. We answer all of your...

Last post

ah, ok, thank you nFA. :)

3 Replies

76 Views

Last post by chasmanian
Fri Mar 27, 2020 3:14 am
Earth motivated exoplanet model

Last post by helicon « Thu Mar 26, 2020 7:50 pm
Replies: 1
by notFritzArgelander » Thu Mar 26, 2020 7:15 pm

1 Replies

27 Views

Last post by helicon
Thu Mar 26, 2020 7:50 pm
XMM-Newton looks at SN remnant W49B

Last post by notFritzArgelander « Thu Mar 26, 2020 12:25 am
Replies: 2
by notFritzArgelander » Wed Mar 25, 2020 3:58 pm

2 Replies

37 Views

Last post by notFritzArgelander
Thu Mar 26, 2020 12:25 am
S&T: Betelgeuse brightens

Last post by helicon « Wed Mar 25, 2020 11:18 pm
Replies: 3
by notFritzArgelander » Tue Feb 25, 2020 10:00 pm

First post

The infrared output has remained constant, comparatively.

Last post

Thanks for the update. Been clouded out for a couple of weeks.

3 Replies

120 Views

Last post by helicon
Wed Mar 25, 2020 11:18 pm
SWaB: all known BHs are growing not decaying

Last post by Michael131313 « Wed Mar 25, 2020 7:08 pm
Replies: 6
by notFritzArgelander » Tue Mar 24, 2020 7:07 am

6 Replies

66 Views

Last post by Michael131313
Wed Mar 25, 2020 7:08 pm
image: map of Bennu

Last post by Michael131313 « Wed Mar 25, 2020 6:40 pm
Replies: 2
by notFritzArgelander » Tue Mar 24, 2020 7:30 pm

2 Replies

28 Views

Last post by Michael131313
Wed Mar 25, 2020 6:40 pm
AAS: how to classify M104?

Last post by Michael131313 « Wed Mar 25, 2020 6:37 pm
Replies: 1
by notFritzArgelander » Wed Mar 25, 2020 3:41 am

1 Replies

48 Views

Last post by Michael131313
Wed Mar 25, 2020 6:37 pm
SWaB: CPT symmetry as inviolable

Last post by notFritzArgelander « Wed Mar 25, 2020 4:01 pm

by notFritzArgelander » Wed Mar 25, 2020 4:01 pm

0 Replies

26 Views

Last post by notFritzArgelander
Wed Mar 25, 2020 4:01 pm
novae undersampled by observation

Last post by notFritzArgelander « Wed Mar 25, 2020 9:04 am
Replies: 9
by notFritzArgelander » Tue Mar 24, 2020 11:15 pm

9 Replies

89 Views

Last post by notFritzArgelander
Wed Mar 25, 2020 9:04 am
search for first stars and galaxies

Last post by helicon « Tue Mar 24, 2020 8:28 pm
Replies: 1
by notFritzArgelander » Tue Mar 24, 2020 7:29 pm

1 Replies

29 Views

Last post by helicon
Tue Mar 24, 2020 8:28 pm
new model for Solar System history

Last post by helicon « Tue Mar 24, 2020 8:24 pm
Replies: 1
by notFritzArgelander » Tue Mar 24, 2020 7:41 pm

First post

Do we really need a Late Heavy Bombardment?

Last post

Gravitational interaction between the giant planets and the planetesimal disk produced disturbances in the gas disk that spread in the form of waves....

1 Replies

28 Views

Last post by helicon
Tue Mar 24, 2020 8:24 pm
gamma ray emission from two star forming galaxies

Last post by helicon « Tue Mar 24, 2020 8:18 pm
Replies: 1
by notFritzArgelander » Tue Mar 24, 2020 7:46 pm

First post

The galaxies are M33 and Arp 299.

Back in VA I could see M33 as a naked eye object. :sigh:

Last post

Interesting examples of the phenomenon - cosmic rays interacting with the interstellar medium leads to extraordinary gamma ray emission.

Don't...

1 Replies

18 Views

Last post by helicon
Tue Mar 24, 2020 8:18 pm
lab measurements help understand core collapse SNs

Last post by notFritzArgelander « Tue Mar 24, 2020 7:32 pm

by notFritzArgelander » Tue Mar 24, 2020 7:32 pm

0 Replies

13 Views

Last post by notFritzArgelander
Tue Mar 24, 2020 7:32 pm
masive gravity?

Last post by helicon « Tue Mar 24, 2020 5:36 pm
Replies: 1
by notFritzArgelander » Tue Mar 24, 2020 2:27 am

First post

It sure sounds good in the above article, but I'm sorry it is already dying. The idea is that the graviton has a small rest mass.

But then gravity...

Last post

Fascinating article notFritz - thanks.

1 Replies

36 Views

Last post by helicon
Tue Mar 24, 2020 5:36 pm
Dr H video on why DE and DM ARE scientific

Last post by notFritzArgelander « Tue Mar 24, 2020 8:25 am
Replies: 4
by notFritzArgelander » Tue Mar 24, 2020 2:29 am

4 Replies

48 Views

Last post by notFritzArgelander
Tue Mar 24, 2020 8:25 am
equivalent to oberth maneuver?

Last post by metastable « Tue Mar 24, 2020 3:38 am
Replies: 2
by metastable » Mon Mar 23, 2020 8:45 pm

First post

riddle me this...

are the following 2 oberth maneuvers equivalent (ignoring the weight of the cable and friction)

in the following diagram, the...

Last post

So I've done some calculations for both vehicles and it seems both are equivalent (as suspected). In other words it isn't necessary for the vehicle...

2 Replies

70 Views

Last post by metastable
Tue Mar 24, 2020 3:38 am
SWaB: 10 places with the right stuff for life

Last post by The Happy Parrot « Tue Mar 24, 2020 1:47 am
Replies: 2
by notFritzArgelander » Mon Mar 23, 2020 8:38 pm

First post

A little over the top with the optimism , I'd say but.... :shrug:

Last post

Ancient Serbian proverb: “Be humble for you are made of dung. Be noble for you are made of stars.“

2 Replies

40 Views

Last post by The Happy Parrot
Tue Mar 24, 2020 1:47 am
AAS: planets in the disks?

Last post by ThinkerX « Tue Mar 24, 2020 1:26 am
Replies: 1
by notFritzArgelander » Tue Mar 24, 2020 1:06 am

First post

Courtesy of the DSHARP project. I'm waiting for the EFLAT project before I decide. ;)

Last post

I seem to remember reading about something similar from most of twenty years ago...nearby stars with thick dust disks and tracks through them. I want...

1 Replies

23 Views

Last post by ThinkerX
Tue Mar 24, 2020 1:26 am

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