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Crewed misson to the moon

www.theguardian.com

Artemis II astronauts rocket towards the moon after breaking free of Earth’s orbit

Spacecraft’s engine fired up for six minutes to propell astronauts on their three-day voyage towards Earth’s natural satellite
www.theguardian.com www.theguardian.com

Now that they’re moonbound, there’s no turning back: the astronauts are on a “free-return” trajectory, which uses the moon’s gravity to slingshot around it before heading back towards Earth without propulsion.

In the event that something goes wrong, the astronauts are wearing suits that also serve as “survival systems” – in the unlikely case of a cabin depressurization or leak, they’ll maintain oxygen, temperature controls and the correct pressure for up to six days.

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King Silkbeard said:
According to Sci fi if they travel around a celestial body like a moon or a sun at great speed they will likely time travel so we might be as a species on the verge of a major breakthrough.
Click to expand...
It’s not time travel. It’s called time dilation. It’s the basics of general relativity. The more velocity you have (or simple terms, the closer you are at moving to the speed of light) the experience of time is different to someone who is “stationary” or low of velocity. Also, the closer you are to a celestial object who’s mass (not size) has gravity, your experience of time runs slower. Too much gravity (a black hole) STOPS time.

So when those astronauts return, because of their velocity and the reduction of the usual gravitational forces they’d experience if they were still on Earth, they’ll be a few seconds younger than everyone else they left behind on Earth.
Astronauts on the space station age a few nanoseconds slower when they spend months on end in earths orbit.
Add entropy and the second law of thermodynamics on top off all the general relativity mentioned above and the maths gets really hairy.
 
menace404 said:
It’s not time travel. It’s called time dilation. It’s the basics of general relativity. The more velocity you have (or simple terms, the closer you are at moving to the speed of light) the experience of time is different to someone who is “stationary” or low of velocity. Also, the closer you are to a celestial object who’s mass (not size) has gravity, your experience of time runs slower.

So when those astronauts return, because of their velocity and the reduction of the usual gravitational forces they’d experience if they were still on Earth, they’ll be a few seconds younger than everyone else they left behind on Earth.
Astronauts on the space station age a few nanoseconds slower when they spend months on end in earths orbit.
And entropy and the second law of thermodynamics on top off all the general relativity mentioned above and the maths gets really hairy.
Click to expand...


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