Linked Questions

13
votes
2answers
2k views

Till what altitude above earth sounds can be heard?

In the new video of SpaceX SAOCOM 1B launch and landing RCS thrusters and other sounds can be heard during boostback burn. Falcon 9 boostback happens at nearly 100 Km altitude. Does the air density at ...
13
votes
2answers
2k views

Can astronauts hear sounds during space walks for repairs?

We know there is no sound in space in a vacuum, but when an astronaut is outside on a spacewalk doing repairs, can they hear the tapping when they use a hammer or the sound of a power screwdriver etc.?...
8
votes
4answers
4k views

Why does spinning help stabilisation?

I don't really understand why do we use spin stabilisation for rocket launches? If I understand correctly, the idea is to make the rocket spin really fast so that any asymmetry in the thrust/...
10
votes
3answers
794 views

Why did New Horizons have to be spin-balanced to grams-level precision? (With quarters!)

This story about receiving a roll of Space-Themed Florida State commemorative quarters from the Governor of Florida mentions that the New Horizons spacecraft had to be "spin-balanced" to ...
21
votes
2answers
888 views

What would sounds on Mars be like?

Figure there was a microphone on the surface of Mars, exposed to the atmosphere. If it recorded stuff, how would it sound? E.g. walking through sand, stuff falling down onto rock, a rocket engine, the ...
4
votes
2answers
329 views

What would it take for a balloon to reach an altitude of 65 km (214,000 ft) above the Earth's sea level?

Kind of a follow-up question to Could a helium balloon on Mars and on Triton float at air pressures lower than it could on Earth due to the bodies' low gravities?. As stated in the linked question,...
7
votes
1answer
586 views

Where does the noise on spacewalks come from?

ISS astronaut Randy Bresnik recently posted a video on social media from his spacewalk, shot with a GoPro. You can watch his clip here (Embedding the clip didn't work): https://twitter.com/...
5
votes
2answers
459 views

Building a ultra-small almost space vehicle

I'm quite interested in small rockets-balloons that can reach more than 50km, thus I want to build one myself (With my school financial support). I just want it to carry like a 350g-450g equipment. ...
7
votes
2answers
159 views

How to make a camera survive in (near) space?

I'm working on project for a high altitude camera suspended from a weather balloon in order to approximately simulate spaceflight. I'm wondering how can I make a camera survive and continue to operate?...
2
votes
1answer
236 views

Do Phonesats and GoPros work with their internal batteries in space vacuum?

After reading the question OTS rechargeable battery for a lunar rover I wondered about examples of OTS (off-the-shelf) batteries in space. There has been at least one cellphone-based satellite, and ...
11
votes
1answer
272 views

What is NASA doing to improve the supersonic parachute for the third LDSD test?

Last month, on June 8, 2015, NASA ran the second Low-Density Supersonic Decelerator (LDSD) flight test off the island of Kauai, Hawaii. The inflatable decelerator portion of the test was successful, ...
3
votes
1answer
252 views

Has adjustable Yo-Yo de-spin been tested or demonstrated?

The video in the interesting question How did the GoFast 2014 Rocket de-spin? shows a de-spin that went well. An initial very fast spin (for stabilization during propulsion) is almost perfectly de-...
3
votes
1answer
591 views

What are the sounds in this GoPro-in-orbit ISS video?

The video description says: Published on Apr 15, 2015 This footage was taken by U.S. astronaut Terry Virts during a spacewalk on the International Space Station on February 25, 2015. Virts and ...
4
votes
1answer
201 views

How does Indonesia's development and test vehicle work? Could something like this reach space or even orbit when scaled up?

Phys.org's Blast off: space minnow Indonesia eyes celestial success says It's a very long way from a Mission Control in Houston, but the Southeast Asian archipelago's answer to NASA has big hopes and ...
0
votes
2answers
98 views

Tradeoffs using a battery/motor/gyro versus tangential thrusters to spin a spherical shell in space?

Using the Humanity Star (see this answer for example for background/context), consider two possibilities for spinning a small spherical shell at a low rate, say perhaps in the neighborhood of 2 to 10 ...

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