[ 3 / biz / cgl / ck / diy / fa / ic / jp / lit / sci / vr / vt ] [ index / top / reports / report a bug ] [ 4plebs / archived.moe / rbt ]

2022-06-09: Search is working again.
2022-05-12: Ghost posting is now globally disabled. 2022: Due to resource constraints, /g/ and /tg/ will no longer be archived or available. Other archivers continue to archive these boards.Become a Patron!

/sci/ - Science & Math


View post   
View page     

[ Toggle deleted replies ]
File: 238 KB, 634x543, Moon to Earth.png [View same] [iqdb] [saucenao] [google]
14596278 No.14596278 [Reply] [Original] [archived.moe]

You are standing on the moon, you throw a rock at earth, would it potentially hit it?
>inb4 the atmosphere would burn it up.
Can it be done?

>> No.14597729
File: 5 KB, 241x209, 1634347593733.jpg [View same] [iqdb] [saucenao] [google]
14597729

The escape velocity of the moon is 2.38 km/s or 10080 km/h

>> No.14597738

need a pretty good arm

>> No.14597774
File: 318 KB, 1144x1512, 45B9C06A-55FF-497B-8EB0-F77F18A011AA.jpg [View same] [iqdb] [saucenao] [google]
14597774

>>14597738
Anyone who spends considerable amount of time on /b/ or /gif/ has one

>> No.14597782

>>14596278
>>inb4 the atmosphere would burn it up.
That's a good enough shot by then, and that means you would of hit it had the atmosphere not been there. . .

>> No.14597909

>>14597774
Short stokes probably aren't that useful for launching objects into space.

>> No.14597955

>>14596278
with your hand? not happening. throwing it from LEO would be a sure shot

>> No.14598313
File: 1020 KB, 2239x2725, 5zEBLxL.png [View same] [iqdb] [saucenao] [google]
14598313

If you stood with the Earth directly overhead and pitched the rock at the horizon due east at 1730 + 680 = 2410 m/s (which would be mach 7 back on Earth), its trajectory would depress down into the Earth's atmosphere. Assuming this rock is small enough to hold, there's no way it's making it to the ground though. Even if it barely scraped the upper atmosphere over a dozen passes and slowed until its orbit became circular, eventually it would dig its heels in under 120 km or so and burn up. If you cast it in a big blob of epoxy mixed with fiberglass it might make it down. When Apollo crew did their 680 m/s trans Earth injection they'd wind up with a perigee of only 50 km.

>> No.14598315
File: 1.35 MB, 4288x2848, image0-19.jpg [View same] [iqdb] [saucenao] [google]
14598315

>>14597955
Couldn't throw it from LEO either. Fastest baseball pitch was 47 m/s. Nominal LEO velocity is 7,500 m/s. Throwing it directly towards Earth would do absolutely nothing and throwing it behind you would maaybe make it reenter several orbits before you do.

>> No.14598349

>>14596278
You? No chance

>> No.14598551

>>14596278
if by throwing you mean using a very powerful railgun, sure.

>> No.14598588

>>14597729
i have a pretty good pitching hand

>> No.14598604

>>14597774
>be me
>coomer
>tasked with the most important pitch in the world
>I am to throw a stone so hard that it reaches escape velocity at such a perfect angle that it cascades towards the earth
>years of angry masturbation has prepared me for this
>begin rolling pitching hand
>"Oh Gawd! I'm going to moon! I'M MOONING!!!!!! AAAAAAAAAAAAAAAAH!!!"
>zero dexterity has made it hit my ship
>gas lodge explodes and the hull erupts spilling the tank all over the face of it
>I did it
>I finally did it
>I coomed on the moon

>> No.14598633

>>14598313
can't tell if based or cringe ksp poster

>> No.14598643

You've watched wayyyy too much animay.

>> No.14599094
File: 102 KB, 684x963, The_Soviet_Union_1970_CPA_3952_stamp_(Luna_16_Leaving_Moon_(1970.09.20)).jpg [View same] [iqdb] [saucenao] [google]
14599094

>>14596278
That's kinda what Luna 16 did, it launched a capsule with a soil sample using a single engine burn and landed in kazakhstan without doing any mid course maneuvers.

>> No.14600374
File: 935 KB, 2402x2580, 20220210_115518.jpg [View same] [iqdb] [saucenao] [google]
14600374

>>14598633
I get paid to do research on spacecraft TPS materials. I'm working on a master's degree in aerospace engineering, but I also play heavily modded ksp (cringe)

>> No.14600436
File: 665 KB, 1400x800, 6465a7e0-f001-11ec-a3b8-3f5eaa0e2dad.png [View same] [iqdb] [saucenao] [google]
14600436

instead of using fuel woundlt it be better if we manipulate the aether into propulsion?

>> No.14600942

>>14597774
Because jacking off is exactly like throwing a heavy object.
Fucking idiot coombrain.

>> No.14601995

>>14600436
but muh conserved angular momentum at 12000 rpm!!!

>> No.14601998

>>14596278
No it would orbit the moon you retard

>> No.14602268

>>14596278
nope

especially if you throw it at the visual position og earth

>> No.14602300

>>14600436
Good idea

How though

>>
Delete posts
Password [?]Password used for file deletion.
Captcha
Action