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Physics and astronomy thread

jamny

By jamny,
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Galileo

Juno mission is extended for another 3 years.  More splendid photos!!  The shot here is from only 9600 miles above the "surface"

MikeIke

Am I the only one who gets way too excited when this thread gets bumped? I love hearing about new discoveries in astronomy specifically and science in general. 

jamny

Yes, they showed the picture.   link

The Gator

The Gator 8,453

Posted
Posted
5 minutes ago, The Z Machine said:

They absolutely nailed it.  NASA is doing a bang up job lately IMO. 

They have to be being pushed by Space X, right? Now we just need to get Blue Origin up to snuff. 

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El Floppo

El Floppo 28,977

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6 minutes ago, TripItUp said:

when do we get to see pictures and drone videos and stuff?

They got pictures literally within a minute or two of that thing sticking the landing.

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The Gator

The Gator 8,453

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17 minutes ago, El Floppo said:

They got pictures literally within a minute or two of that thing sticking the landing.

We broke the speed of light!?!*  😉
 



 

 

 

 

 

 

*Mars is three light minutes away, so at least that. 
 

 

 

 

or it was faked :tinfoilhat:

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El Floppo

El Floppo 28,977

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1 minute ago, The Gator said:

We broke the speed of light!?!*  😉
 



 

 

 

 

 

 

*Mars is three light minutes away, so at least that. 
 

 

 

 

or it was faked :tinfoilhat:

Brains, meet Brad.

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El Floppo

El Floppo 28,977

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21 minutes ago, El Floppo said:
28 minutes ago, TripItUp said:

when do we get to see pictures and drone videos and stuff?

They got pictures literally within a minute or two of that thing sticking the landing.

Can't spend time to look now, but I bet those pics are up somewhere...sorry I didn't link them.

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Sand

Sand 6,098

Posted
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3 hours ago, The Gator said:

They have to be being pushed by Space X, right? 

No, not a thing.  This is a very different technology than a rocket.  

Kudos to NASA and APL.  Nailed it!

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The Gator

The Gator 8,453

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10 minutes ago, Sand said:

No, not a thing.  This is a very different technology than a rocket.  

Kudos to NASA and APL.  Nailed it!

Not the tech of rocket vs lander, just the advancement of the overall tech and pushing limits. Listening to Jim Green today and him breaking down how they had to decide how to land a much larger rover made me think of SpaceX.  

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El Floppo

El Floppo 28,977

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2 hours ago, El Floppo said:
3 hours ago, El Floppo said:
3 hours ago, TripItUp said:

when do we get to see pictures and drone videos and stuff?

They got pictures literally within a minute or two of that thing sticking the landing.

Expand  

Can't spend time to look now, but I bet those pics are up somewhere...sorry I didn't link them.

Link

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joffer

joffer 12,477

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2 hours ago, The Gator said:

 

*Mars is three light minutes away, so at least that. 
 

About 11 mins right now actually

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Sand

Sand 6,098

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21 minutes ago, The Gator said:

Not the tech of rocket vs lander, just the advancement of the overall tech and pushing limits. Listening to Jim Green today and him breaking down how they had to decide how to land a much larger rover made me think of SpaceX.  

It's the other way around.  In general, SpaceX leveraged NASA technology much more than the other way around.  The heatshield technology is all NASA.  The retro rocket landing is likely inspired by SpeceX, though.  They've done good work there.

Mars is a tough place to land.  Enough atmosphere to heat the crap out of stuff, but not enough to slow things down.  Right now we can't slow down enough to land at higher altitudes with most payloads.  I'm hoping one day to see them use HIAD technology when we start landing really big stuff.  I worked on that a few years back - really cool stuff.

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The Gator

The Gator 8,453

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7 minutes ago, Sand said:

It's the other way around.  In general, SpaceX leveraged NASA technology much more than the other way around.  The heatshield technology is all NASA.  The retro rocket landing is likely inspired by SpeceX, though.  They've done good work there.

Mars is a tough place to land.  Enough atmosphere to heat the crap out of stuff, but not enough to slow things down.  Right now we can't slow down enough to land at higher altitudes with most payloads.  I'm hoping one day to see them use HIAD technology when we start landing really big stuff.  I worked on that a few years back - really cool stuff.

That’s pretty cool, thanks for link. 

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FBG26

FBG26 754

Posted
Posted (edited)
9 hours ago, El Floppo said:

It's cold up there on mars. Mittens required.

You're telling me you had two pair of gloves this whole time?

Uh yeah, it's the [[Rockies]] Mars!

 

PS, [s]strike through[/s] didn't work any more?

Edited by FBG26
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prosopis

prosopis 1,554

Posted
Posted
10 hours ago, The Gator said:

Not the tech of rocket vs lander, just the advancement of the overall tech and pushing limits. Listening to Jim Green today and him breaking down how they had to decide how to land a much larger rover made me think of SpaceX.  

where are you listening to Jim Green? podcast?

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Leeroy Jenkins

Leeroy Jenkins 3,041

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15 hours ago, El Floppo said:

They got pictures literally within a minute or two of that thing sticking the landing.

Those were photos from the engineering cameras -- used for navigation.  Hi-Res pics from the "real" cameras will come after diagnostic tests and other stuff apparently. 

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El Floppo

El Floppo 28,977

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6 minutes ago, Sinn Fein said:

Perseverance being lowered from the skycrane (hover rocket lander thingy) onto the surface of Mars.

 

 

They'll supposedly be releasing video of the landing soon.

That pic is absolutely amazing!

 

Does anybody know where the sky crane flew off to after dropping the rover? Did it just bounce somewhere and crash-land to not hit or get in the rovers way...or is it safely landed somewhere for reuse?

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The Z Machine

The Z Machine 5,306

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On 2/19/2021 at 1:30 PM, El Floppo said:

They'll supposedly be releasing video of the landing soon.

That pic is absolutely amazing!

 

Does anybody know where the sky crane flew off to after dropping the rover? Did it just bounce somewhere and crash-land to not hit or get in the rovers way...or is it safely landed somewhere for reuse?

It flew away toward the north to crash not anywhere near the rover.  It was always design to fly north regardless of terrain after the cables detached. 

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El Floppo

El Floppo 28,977

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4 minutes ago, The Z Machine said:

It flew away toward the north to crash not anywhere near the rover.  It was always design to fly north regardless of terrain after the cables detached. 

Thanks!

Was just reading up on it too...turns out my old neighbor and school mate Adam Steltzner was in charge of all of that. 

It makes perfect sense, but I still hoped it was designed to fly off and land somewhere, to be salvaged or used as a relay or antenna booster or something.

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heckmanm

heckmanm 4,433

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1 hour ago, El Floppo said:

Thanks!

Was just reading up on it too...turns out my old neighbor and school mate Adam Steltzner was in charge of all of that. 

It makes perfect sense, but I still hoped it was designed to fly off and land somewhere, to be salvaged or used as a relay or antenna booster or something.

As long as Mark Watney can find it when he needs it.

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The Z Machine

The Z Machine 5,306

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2 hours ago, joffer said:

i didn't realize Perseverance had a RTG in it for power.  Plutonium 238. cool.

I think that's because of the issues that Opportunity had with solar panel charging and the dust storm that finally killed it.  Those rovers had some nuke thermal power as well, but not enough to run the whole thing.

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El Floppo

El Floppo 28,977

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Hfs.

Just breathtaking...literally.

Hi res videos were unbelievable. And audio...more about the history making than the actual audio...but equally breathtaking. Can't wait to see and hear more from the surface of mars...and hoping they'll be able to link video with audio.

I think they said everything is up on their website...astonishing.

 

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Phil Elliott

Phil Elliott 1,139

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Sorry if a honda...watched a great episode of NOVA last night explaining the development of Perseverance and some of the critical issues they addressed such as how do you fly a drone in atmosphere that is 1/100th of earth, developing ability to create oxygen for future mission as the fuel to blast off to return to earth, developing ability to determine where to land, how to process/store the core samples and the main objective of looking for signs of "life".

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The Z Machine

The Z Machine 5,306

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On 2/25/2021 at 9:56 AM, Phil Elliott said:

Sorry if a honda...watched a great episode of NOVA last night explaining the development of Perseverance and some of the critical issues they addressed such as how do you fly a drone in atmosphere that is 1/100th of earth, developing ability to create oxygen for future mission as the fuel to blast off to return to earth, developing ability to determine where to land, how to process/store the core samples and the main objective of looking for signs of "life".

What i can't figure out is why they don't build and send 3 or 10 at a time.  Economies of scale here, people. 

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