Recent comments in /f/space

abcxyztpgv2 t1_j87xf0h wrote

https://en.m.wikipedia.org/wiki/Absolute_zero

Snippet to answer your curiosity:

It is commonly thought of as the lowest temperature possible, but it is not the lowest enthalpy state possible, because all real substances begin to depart from the ideal gas when cooled as they approach the change of state to liquid, and then to solid; and the sum of the enthalpy of vaporization (gas to liquid) and enthalpy of fusion (liquid to solid) exceeds the ideal gas's change in enthalpy to absolute zero. In the quantum-mechanical description, matter (solid) at absolute zero is in its ground state, the point of lowest internal energy.

https://www.nature.com/articles/nature.2013.12146

Quantum gas goes below absolute zero

8

Tdshimo t1_j87x5sm wrote

A good way to think about temperature in this context is that it is a measurement of how quickly atoms or particles are vibrating. When atoms/particles stop vibrating, they reach the lowest temperature it can possibly reach… at which point, our scales for measuring temperature stop, and nothing exists below it. This is at 0 Kelvin, –273.15°C, or –459.67°F. These represent the floor for temperature, so temperature cannot reach -10,000° because it’s physically not a thing.

2

Cur-De-Carmine t1_j87wqgb wrote

Temperature is a measure of particle movement. All movement stops at absolute zero, which is 0° Kelvin, or -273° Celsius, IIRC. What you're suggesting is literally impossible.

7

Homeless_Man92 t1_j87wnj1 wrote

Absolute 0 is -273,15 Celsius. At this point molecules are just frozen in time and don’t move so it’s not able to produce heat.

8

space-ModTeam t1_j87w9tt wrote

Hello u/Sad-Fill-3540, your submission "If you really try hard for something and keep doing it, God Himself will bring it to you........just keep trying" has been removed from r/space because:

  • It is not related to space.

Please read the rules in the sidebar and check r/space for duplicate submissions before posting. If you have any questions about this removal please message the r/space moderators. Thank you.

1

EmergeHolographic OP t1_j87st3m wrote

>This animation features actual satellite images of the far side of the moon, illuminated by the sun, as it crosses between the DSCOVR spacecraft's Earth Polychromatic Imaging Camera (EPIC) and telescope, and the Earth - one million miles away.

Credits: NASA/NOAA

I made this stereo gif by using motion parallax to get depth, where you use the next and previous frames to make a stereograph. The top row is for cross-eye viewing, the bottom row for parallel-eye viewing

While this illusion is cool, the moon does appear much closer to the Earth than it is in reality. The moon is vastly farther than the impression you'd get from just this GIF alone

7

ace17708 t1_j87mfyw wrote

This is great for Blue Origin! Competition is fantastic at pushing for better tech and safety standards along with SOP and culture at work.

I seem to recall early in Space Xs life people were look forwards to competition and welcoming it. Same thing happened with Tesla with Musk and the fanbase welcoming it. Then competitors come and all goodwill leaves with people wanting them to fail and quit before they even attempt anything.... thats not productive for anyone.

Also I remember some people here and at a certain Private space sub reddit wishing for the SLS to explode on launch so NASA can just abandon it... Toxic team cheering is not a good look.

1