When to Launch a Mars Mission

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When's the right time to launch a spacecraft from Earth to Mars? Ideally, we want to find the perfect launch window when the planets are aligned for a journey that will minimize the amount of fuel needed. In celebration of NASA's launch of Perseverance and the 8th anniversary of the landing of Curiosity, we explore some orbital mechanics, the Hohmann transfer orbit, and what it takes to get a spacecraft to Mars.

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Went looking for a good explanation of launch windows; found a few far too overcomplicated examples, and then found this. Perfect. Kudos!

peNdantry

Excellent work Brian!.. I never knew that cs50's preceptor is such a well-rounded person.
I also absolutely love your cs50w & AI lectures! keep it up man...

khyaatisrivastava

Wow this is amazing! I mean i know all this stuff but explaing to other is PAINFUL. But now i can just show this video! Thank you, you are making my job a lot easier 👍

fallendown

POV, you are searching how to go to duna

XX

Thank you so much for making this amazing video!

These graphics are extremely useful for demonstrating the concept :)

MarsMatters

this is a great video that simply explains some basic space travel information that the average person just isnt going to be aware of.

Space X will no doubt be doing a flurry of crewed launches during the optimal launch windows as it builds its Mars colony but im wondering if unmanned cargo missions will happen at times other than the busiest launch times

BradiKal

A little game called Space flight simulator is a great way to experience it yourself and visualise it!

realbrickbread

Nice. I like the content you choose to dive into. Sub earned brother.

indylockheart

Excellent explanation for everyone to get it. Congrats!

avlfcrb

So, this is the optimal launch window in terms of fuel efficiency, but what about travel time? If we assumed fuel efficiency is no issue (perhaps in the future we've designed an ultra-efficient engine), when would be the optimal launch window to reach mars as fast as possible?

Intuitively I wanna say it'd be "a little after opposition happens" so that if the rocket travels in a straight line as if mars and earth were in opposition mars will be where the ship is aiming by the time the ship gets there, but idk how right or wrong that is

Knyex

this the best video on this topic thanks

DiamaraldGaming

Great vid bro! loved the animations, how do you make them btw?

lautaromelchiori

Bruhh your content deserve at least more than 10 million subscribers
And it will happen just don't stop making videos
Ik on YouTube people like cringy contenet
And these type of knowledge layer add-on are not getting more views but its changing now
All the best bro, keep going👍🙏😊

HarshPatel-iyqe

An interesting factor is speed control. The first one I thought of is when the rocket eventually reaches Mars, its going too fast to get captured in a Mars orbit, so it has to slow down there. And, when its leaving Mars to return to earth, its orbit is way out wide, so it needs to accelerate away from Mars, but to end up at a slower speed (relative to the Sun) so it can have an elliptical solar orbit whose perihelion is close to earth. But again, after falling towards the sun in this orbit, that speed (relative to earth) is too high so the rocket has to slow way way down to get captured in earth's orbit.

BrianStDenis-pjtq