Starship Asterisk*

by **johnnydeep** » Wed Nov 15, 2023 4:33 pm

Ann wrote: ↑Wed Nov 15, 2023 6:02 am What would it look like to return home from outside our galaxy? Okay, so... If you were outside our galaxy, how could you find your way home (even if it was possible for you to travel impossibly fast)?

It's not as if our Sun looks that remarkable from outside or galaxy, and it's not as if it's holding up a sign to stand out in a crowd, and it is not as if our galaxy is providing a GPS with that teardrop-shaped thing pointing at the Sun to guide wayward travellers on their way home.

The Sun is here ESA Gaia DPAC.png

Don't hold your breath looking for that sort of sign on your way back home from intergalactic space!

Or you mean Gaia would provide that sort of detailed Milky Way map to actually make it possible for intergalactic travellers to find their way home? Really?

Ann

How about using GPPS to navigate home? That would be the Galactic Pulsar Positioning System™. See https://skyandtelescope.org/astronomy-n ... -missions/.

This was also how the Sun's position in the galaxy was etched on the Pioneer and Voyager records/plaques:

https://en.wikipedia.org/wiki/Pioneer_plaque#Sun_and_galactic_landmarks wrote:The radial pattern on the left of the plaque shows 15 lines emanating from the same origin. Fourteen of the lines have corresponding long binary numbers, which stand for the periods of pulsars, using the hydrogen spin-flip transition frequency as the unit. Since these periods will change over time, the epoch of the launch can be calculated from these values.

The lengths of the lines show the relative distances of the pulsars to the Sun. A tick mark at the end of each line gives the Z coordinate perpendicular to the galactic plane.

If the plaque is found, only some of the pulsars may be visible from the location of its discovery. Showing the location with as many as 14 pulsars provides redundancy so that the location of the origin can be triangulated even if only some of the pulsars are recognized.

: Click to view full size image

by **Ann** » Wed Nov 15, 2023 6:02 am

What would it look like to return home from outside our galaxy? Okay, so... If you were outside our galaxy, how could you find your way home (even if it was possible for you to travel impossibly fast)?

It's not as if our Sun looks that remarkable from outside or galaxy, and it's not as if it's holding up a sign to stand out in a crowd, and it is not as if our galaxy is providing a GPS with that teardrop-shaped thing pointing at the Sun to guide wayward travellers on their way home.

Don't hold your breath looking for that sort of sign on your way back home from intergalactic space!

Or you mean Gaia would provide that sort of detailed Milky Way map to actually make it possible for intergalactic travellers to find their way home? Really?

Ann

by **johnnydeep** » Tue Nov 14, 2023 8:08 pm

Oh, if only we could really travel as fast as is shown in this video, relativity be damned!

by **Wolf** » Thu Sep 29, 2016 8:46 pm

neufer wrote: Or the APOD featured traveler is moving at about (1.0 - 1.3x10^-24) times the speed of light
while measuring seconds using his own veerrryyyy slow clock.

... or her slow clock... or... not sure...

by **neufer** » Thu Sep 29, 2016 8:11 pm

Wolf wrote:
Wolf wrote:
ta152h0 wrote:
Tdere is another Wolf ere ?
Ja, virtually... but traveling at about 6 kpc/s
If my math is not mistaken,
this means this APOD featured traveler is moving at about 617 billion times the speed of light.

Or the APOD featured traveler is moving at about (1.0 - 1.3x10^-24) times the speed of light
while measuring seconds using his own veerrryyyy slow clock.

by **Wolf** » Thu Sep 29, 2016 6:44 pm

Wolf wrote:
ta152h0 wrote:Tdere is another Wolf ere ?
Ja, virtually... but traveling at about 6 kpc/s

If my math is not mistaken, this means this APOD featured traveler is moving at about 617 billion times the speed of light.

It certainly puts into question interstellar travel let alone intergalactic travel... on the other-hand, "where are they?"

by **sandra** » Thu Sep 29, 2016 5:43 pm

earth looks like a louse egg on a hair

by **Wolf** » Tue Sep 27, 2016 8:39 pm

ta152h0 wrote:Tdere is another Wolf ere ?

Ja, virtually... but traveling at about 6 kpc/s

by **geckzilla** » Tue Sep 27, 2016 6:33 pm

Brit_in_Exile wrote:Spot the deliberate mistake anyone ?
Shouldn't our favourite star (Sol) seem to get bigger as we get nearer to it ?

It's representative of the Sun's position, but it's not representative of its size. Your question would be better phrased: Shouldn't our favourite star (Sol) be smaller than a pixel when we are far away from it?

They could have made all the stars their actual size and then the animation would be totally black.

by **ta152h0** » Tue Sep 27, 2016 5:55 pm

Tdere is another Wolf ere ?

by **Brit_in_Exile** » Tue Sep 27, 2016 5:07 pm

Wolf wrote:
heehaw wrote:
Boomer12k wrote:Did that when I was 18. Around 1971'... In Meditation, left my body,
Regardless of what you think, delusion, or illusion, imaginary, or conscious dreaming,...
:---[===] *

Hmmm 1971.............I don't suppose you were tending more towards "Lucy in the Sky with Diamonds" than "Here Comes the Sun" ?

by **Brit_in_Exile** » Tue Sep 27, 2016 4:59 pm

Spot the deliberate mistake anyone ?
Shouldn't our favourite star (Sol) seem to get bigger as we get nearer to it ?

by **Wolf** » Mon Sep 26, 2016 7:52 pm

heehaw wrote:
Boomer12k wrote:Did that when I was 18. Around 1971'... In Meditation, left my body,
Regardless of what you think, delusion, or illusion, imaginary, or conscious dreaming,...
:---[===] *
I don't discount that! There's much more to the Universe than astronomy: http://henry.pha.jhu.edu/The.mental.universe.pdf

BMAONE23 wrote: I was waiting for a different punch line
Son: Mom, why is the sky so bright? I can't sleep!
Mom: I know son. It's morning and the Sun is up

Good one!
But…. Is the new heehaw punch line…
Mom: I know son. It’s morning and the Sol us ipse

by **heehaw** » Mon Sep 26, 2016 6:03 pm

Boomer12k wrote:Did that when I was 18. Around 1971'... In Meditation, left my body,
Regardless of what you think, delusion, or illusion, imaginary, or conscious dreaming,...
:---[===] *

I don't discount that! There's much more to the Universe than astronomy: http://henry.pha.jhu.edu/The.mental.universe.pdf

by **Boomer12k** » Mon Sep 26, 2016 5:49 pm

Did that when I was 18. Around 1971'... In Meditation, left my body, with no break in consciousness, went out, way out... past galaxies... came back, galaxies whipping by, to our Galaxy, and finally our part, and stars, and Solar System, and finally Earth, North America, Oregon, Salem, neighborhood, and above the house, when "HUUUUUUUUHHHH...." big inhale... Without any break in consciousness, I reentered the body. Re-entry was a bit hard... but I slammed into the body, and became aware of the sensations and was in normal conscious awareness... it was such an event, that I put away my meditation tools the next day, and forgot about the incident, until the early 80's, when I picked up meditation with my martial arts practice...
Regardless of what you think, delusion, or illusion, imaginary, or conscious dreaming, I had full control of what I did, except re-entry, that was more sudden, as it happened from outside the house... which to me at least, shows me that I WAS out...
You have to be super relaxed to do it. I had done candle meditations for weeks. No drugs were involved... just in case you were thinking that...

Now here is a similar video representation... Cool.

:---[===] *

by **BMAONE23** » Mon Sep 26, 2016 4:48 pm

Ann wrote:
geckzilla wrote:
Sudhamshu wrote:Going by the video, between 10 secs to 20 secs, it appears our Sun (Sol) is part of a Globular Star Cluster. Is that really the case? Or is it a result of insufficient data of the Milky Way so far?
I think it's just marking the edge of the data.
Absolutely. We're not inside a globular cluster. Trust me, we'd notice!

Son: Mom, why is the sky so bright? I can't sleep!

Mom: I know, son. It's all those darn stars in the sky. Darn light pollution!

Ann

I know, I know... our eyes would have adapted so that the brilliant starlight wouldn't bother us...geez...

I was waiting for a different punch line

Son: Mom, why is the sky so bright? I can't sleep!
Mom: I know son. It's morning and the Sun is up

by **Chris Peterson** » Mon Sep 26, 2016 4:32 pm

Ann wrote:I hope Gaia will release a catalog soon, so we can check up its stars!

They already did. http://gaia.esac.esa.int/documentation/GDR1/.

by **bystander** » Mon Sep 26, 2016 4:09 pm

Ann wrote: I hope Gaia will release a catalog soon, so we can check up its stars!

http://asterisk.apod.com/viewtopic.php?t=36371

by **Wolf** » Mon Sep 26, 2016 3:28 pm

neufer wrote:
Ann wrote:
Absolutely. We're not inside a globular cluster. Trust me, we'd notice!

Son: Mom, why is the sky so bright? I can't sleep!

Mom: I know, son. It's all those darn stars in the sky.
Son: Mom, why is the sky so bright? I can't sleep!

Mom: I know, son. We live at 56N and the Sun doesn't set until 10 PM.

Is this 56N "Sun" set on the planet in the global cluster?

If so, those entities would be similar to hydrogen-helium type beings (perhaps like on Jupiter) who may sense human sight wavelengths like a match in the dark.

by **neufer** » Mon Sep 26, 2016 3:00 pm

Ann wrote:
Absolutely. We're not inside a globular cluster. Trust me, we'd notice!

Son: Mom, why is the sky so bright? I can't sleep!

Mom: I know, son. It's all those darn stars in the sky.

Son: Mom, why is the sky so bright? I can't sleep!

Mom: I know, son. We live at 56N and the Sun doesn't set until 10 PM.

by **Ann** » Mon Sep 26, 2016 1:39 pm

mwhidden wrote:As we begin to zoom in on the solar system, there is a faint number in the background stars: 3796072587910775936
What is this number and why is it there?

This is a Gaia catalog number, given to a specific star. The star likely doesn't have a Hipparcos, HD, SAO or other number belonging to a well-known catalog.

I hope Gaia will release a catalog soon, so we can check up its stars!

Ann

by **mwhidden** » Mon Sep 26, 2016 1:26 pm

As we begin to zoom in on the solar system, there is a faint number in the background stars: 3796072587910775936
What is this number and why is it there?

by **Wadsworth** » Mon Sep 26, 2016 1:10 pm

Pretty cool.

by **darksky2500@gmail.com** » Mon Sep 26, 2016 12:20 pm

Many milky way simulations suffer from this problem - the galaxy itself is presented as a generic agglomeration of stars (with the best information we have about the central bar and spiral arms guiding the overall appearance) but the data we have on the actual stars of our galaxy is known to within a few hundred light years of the sun. So when the simulation zooms in on our location, actual star location data takes over from the low resolution "average" galaxy appearance, and you have this apparent cluster of stars in our solar neighborhood. I'm pretty sure our stellar neighborhood is pretty typical of what you'd find anywhere else in a spiral arm, it's just that looking at the real data as opposed to the broad-brush averages is pretty apparent.

Sudhamshu wrote:Going by the video, between 10 secs to 20 secs, it appears our Sun (Sol) is part of a Globular Star Cluster. Is that really the case? Or is it a result of insufficient data of the Milky Way so far?

by **alex_rrty** » Mon Sep 26, 2016 9:59 am

Hi,

Starting from 0:11 in the movie, do all these points represent actual stars or only the named ones are in the data ? Really impressive anyway.

Thanks

Starship Asterisk*

APOD: Gaia: Here Comes the Sun (2016 Sep 26)

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