All Questions

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1answer
11 views

Is the newly discovered exoplanet 'Teegarden b' habitable?

A new exoplanet has been just discovered around the star Teegarden, at only 12 light years away.
2
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1answer
18 views

Why was the Saturn V considered to be human-rated after Apollo 6?

Apollo 6 (AS-502) was the second flight of the Saturn V (the first having been Apollo 4/AS-501, five months earlier), the last flight of a Block I CSM,1 and the last unmanned Apollo mission (if one ...
0
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0answers
8 views

Can astronomy use the black hole at the center of the Milly way as true south on a space compass?

Can astronomy use the black hole at the center of the Milly way as true south on a space compass? As far as space travel is concerned they claim to not use any space compass. Would this be a good ...
0
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0answers
6 views

Undisturbed planetary alignment after galactic collision [on hold]

How do planets still orbit around the empty space where a black hole was after a black hole takes it and keeps moving through space without disturbing surrounding planets that where orbiting that ...
1
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1answer
31 views

Space Shuttle Moon Mission? [duplicate]

Theoretically speaking, could the shuttle have performed TLI, LOI, and TEI burns given extra OMS fuel? approximately how much fuel and payload bay space/mass would this take up and might there ...
0
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1answer
15 views

How microgravity in space affects body parts

There are things that naturally face downwards, like hands. How would they be affected in space microgravity? Would they rise or point downwards?
1
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0answers
23 views

Recalculate Orbital Elements after a ΔV

I would like to write a program able to simulate a keplerian orbite given an initial position and velocity (r0, v0) and able to manage accelerations in different directions. To simulate the orbite, I ...
0
votes
2answers
70 views

What Gravity does the Sun affect items with at the distance of 1 AU?

At the surface of the Earth, the force of gravity is defined as 1 G. I am wondering what gravitational force the sun excerts at the distance of 1 AU (the distance Earth is at). Imagine it like this; ...
12
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2answers
1k views

What was the Shuttle Carrier Aircraft escape tunnel?

The Wikipedia article for the Shuttle Carrier Aircraft mentions an escape tunnel: The avionics and engines were also upgraded, and an escape tunnel system similar to that used on Boeing's first 747 ...
1
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1answer
51 views

How to become an astronaut?

I am a pure/applied mathematics student at Tehran University. About 2 or 3 years later I will get my bachelor's degree and start studying master's in applied math or theoretical physics. And maybe I ...
3
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1answer
102 views

Why was Apollo 17 considered to have “achieved a very successful geological survey”?

They listed out all the apollo missions, with blurbs about what the outcomes were, for example here's 15, 16 and 17: 15 - Landed on moon and deployed lunar rover. 16 - Landed on moon and deployed ...
3
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2answers
85 views

Are Lagrangian points associated only with the smaller body?

Diagrams of Lagrangian points I've seen always show the points near the smaller object, following its orbit about the larger one. For instance: from Wikipedia. But in fact the smaller object ...
18
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3answers
2k views

Why does the Saturn V have standalone inter-stage rings?

Why are they not integral to the lower stages, e.g. like the Falcon 9? This applies not only to the ring between the first and second stage and also to the shoulder between the second and third stage.
1
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1answer
59 views

Did the heat shield of the Vostok 1 capsule ablate during reentry?

This Wikipedia article (in german) has some information about the heat shield of Vostok 1. The heat shield was made from asbestos, its thickness was increased from 3 cm to up to 18 cm. The weight of ...
4
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0answers
63 views

How much did it cost to refurbish the Launch Complex 39 hardware after an Apollo Saturn V launch?

A launch pad used for a rocket of some 30-35 MNewtons of thrust does not come out of it unscathed. It must be refurbished before it can be used again. How much does that cost? As an indication of such ...
2
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0answers
30 views

How can I calculate the azimuth from an earth station to a satellite

I have computed the ecef coordinates of both the user location on the ground, the satellite's ecef coordinates, as well as other inputs such as altitude, lat, long of both satellite and earth station....
1
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1answer
71 views

What was the exact nature of the observations of “solar flare activity” that delayed the launch of Vostok 5?

The interesting story of Vostok 5 recounted in Encyclopedia Astronautica's Vostok 5 (linked in comments below this answer) includes the following passage: Vostok 5 was originally planned to go for ...
2
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0answers
44 views

How accurate can a point in space be determined by the likes of the ICRF?

How accurately could a 3D point in open space (i.e. not on an object), say at an elevation of 30,000m above sea level, be located or modelled using the likes of the International Celestial Reference ...
3
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1answer
85 views

What's this mini-cupola-looking object in this photo from the ISS?

(I went through this exercise for my own benefit, so I figured I'd post it) Recently stay-extended astronaut Christina Hammock Koch posted this image to Facebook today and the object indicated by the ...
3
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0answers
71 views

Why was the Communications Carrier Assembly black and white?

I understand the CCA, the headset for NASA astronauts, was made up of lycra and teflon fabrics. Is there a reason, relevant to space flight, that the two materials were different colors?
2
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0answers
37 views

Noise inside an ACES/pumpkin suit helmet?

As I understand it there was plenty of noise inside a NASA EVA suit helmet from fans circulating the air. Was the Advanced Crew Escape Suit helmet for launch and reentry similarly noisy?
3
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1answer
106 views

Would SpaceX's Starlink constellation contribute inordinately to space debris?

I mean they already launched a large constellation of 60 satellites and have plans to launch many more; won't all this contribute inordinately to existing space junk, which is actually becoming a real ...
13
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2answers
4k views

How did the Vostok ejection seat safely eject an astronaut from a sealed space capsule?

Wikipedia's Yuri Gagarin says: At about 23,000 feet (7,000 m), Gagarin ejected from the descending capsule as planned and landed using a parachute. and the section Vostok_programme; Vostok 3KA ...
5
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1answer
1k views

How exactly were solid-fuel rockets added to the parachute lines of the Voskhod capsule?

This answer notes that Voskhod: ...added a small solid-fuel rocket to the parachute lines. It fired as the descent module neared touchdown, providing a softer landing. How exactly did they safely ...
2
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1answer
194 views

When did soviet capsules begin using retropropulsion immediately before landing?

Wikipedia's Yuri Gagarin says: At about 23,000 feet (7,000 m), Gagarin ejected from the descending capsule as planned and landed using a parachute. and the section Vostok_programme; Vostok 3KA ...
5
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1answer
60 views

Launch Azimuth for Southeast launches

I've got the formula for launching to space going Northeast as $$\cos(inc) = \cos(lat) \sin(az)$$ and that works great but what if I wanted to go southeast? For example, I know that from a ...
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0answers
24 views

Cubesat Communication Problems [on hold]

Can anybody tell me what are the current problems faced in cubsats especially in communications domain ? Can anybody please provide me some insights ?
2
votes
1answer
46 views

Oxidizer Line Pressure of DIY Hybrid Rocket Engine Limits Thrust?

So I’ve seen engines like these which use gaseous oxygen as an oxidizer and then a solid tube as a fuel. But do these types of hybrid engines have any possibility of creating a useful amount of thrust?...
3
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2answers
176 views

Why does the Falcon 9 launch heavier payload in LEO than Ariane V and the other way around for GTO?

Browsing a comparison of orbital launch systems on wikipedia, I notice that launcher capable of launching payload in GTO can launch in GTO approximately all the mass of the payload they can launch in ...
16
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2answers
3k views

What preparations would Hubble have needed to return in a Shuttle?

This answer states that the Hubble Space Telescope was originally intended to be returned to Earth in a Shuttle. (from shuttle manifest published immediately before the Columbia failure, showing the ...
2
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0answers
30 views

At the same temperature, what's the relation of speed of heat loss between Earth and Mars?

Mars has a thinner athmosphere than Earth. Let's say you have a similar shelter of the same volume and made of the same materials in Mars at -70 Celsius, and in Earth in some place in the Antarctica ...
6
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1answer
85 views

How much of the recovery system does Spacex remove from a Falcon 9 when using it in an expended manner?

Falcon 9s have a limit to how many times they can be reused, and, for the last flight of a booster they don't make it land (in one piece), and instead use all the fuel to help the payload. That way ...
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0answers
33 views

Shirtsleeves environment in Martian caves [duplicate]

Are there currently any places on Mars (that we know of) that are deep enough and warm enough that a human could survive with only an oxygen mask? Are there any caves, trenches, or valleys deep enough ...
4
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2answers
165 views

Could the Lunar Rover jump start the Lunar Module in an emergency?

In Scott Manley's video Why Lunar Landers Had Jumper Cables For Emergencies he describes the "LOSS OF ED [Explosive Device] SUB-SYSTEM" procedure, which includes the use of a jumper cable called the "...
2
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1answer
30 views

Converting Keplerian coordinates into Latitude and Longitude

Introduction My goal is follow up the title of this question and obtain the Earth coordinates (latitude, longitude) from the keplerian coords ...
0
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1answer
70 views

Space Software Engineering [closed]

I am a software engineer having experience in application development in IT industry. I have completed M.Tech.in Computer Science from IIT. Khabe skills and worked on following: Java Jsp Servtlet ...
23
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3answers
7k views

Time at 1 g acceleration to travel 100 000 light years

How long would it take to go 100,000 light years at a constant 1 g acceleration?
2
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2answers
101 views

Do astronauts floating in space experience disorientation and how do they overcome it?

Sometimes we experience confusion where the north or south is especially when we are lying down or just awoken from sleep. Do astronauts experience something similar in space? If so, how do they ...
2
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0answers
100 views

Is the term 'lead head' used by astronauts?

In an article on the Space.com website, the author states "Very few astronauts have what's called the 'lead head'--immune from space adaptation syndrome or space sickness." I couldn't find any other ...
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0answers
30 views

What will TransAstra Corp's MiniBee practice its Optical Mining technique on?

Space.com's NASA Eyes Wild Space Tech Ideas to Mine the Moon (and Asteroids, Too!) says: The other project is called Mini Bee and is led by Joel Sercel, founder and CEO of TransAstra Corp. Mini Bee ...
1
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1answer
77 views

Precisely when did the Shuttle's roll program occur?

Previous answers state that the Shuttle launch roll program occurred as soon as practical after tower clear and was achieved by SRB thrust vector control. Can we get a more precise answer on the ...
2
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1answer
104 views

ACES helmet and space sickness

I thought I read somewhere that when astronauts removed the ACES helmet it often exacerbated space sickness. ACES (Advanced Crew Escape Suit)-the orange suit worn during shuttle launches Is there ...
0
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2answers
121 views

How many stages needed for a launch ? How to plan a launch

I am looking on how to find out how many stages are needed to reach a certain orbit. I come across equations to compute the height reach by a stage of a certain time. On the other hand I don't find ...
1
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2answers
91 views

At what point of a standard transition from Earth to Mars do both planets have the same apparent magnitude, and what's its value?

Apparent magnitude is meant with respect to the crew of the vehicle. For the trajectory, please pick any that can be considered normal. Also, it would be nice to have comparisons with other objects ...
0
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1answer
104 views

Is there any use for the “main body tool” of the BFR, now that the design has switched from carbon fiber to steel?

As far as I know, the BFR's main body tool was supposed to serve as a positive mold for the carbon fiber structure. Now that the design is deprecated and that SpaceX is building Starhopper without ...
3
votes
1answer
68 views

F9 - Lift Off from “Landing Legs” [duplicate]

Could it ever be possible for Falcon 9 to lift off from its own "landing legs"? i.e. no strongback, no complex launch pad support, just land somewhere, get a new second stage and a tank of gas and off ...
1
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1answer
52 views

Why a polar orbit for TWINKLE?

TWINKLE will use a 0.45 meter telescope to record spectra of stars transited by their exoplanets. By looking at tiny changes in the spectrum as the planet's atmosphere moves in front of the star, they ...
16
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2answers
4k views

Does anyone recognize these rockets, and their location?

I clicked an advertisement in the sidebar of an Economist article and it took me to this infomercial from Mitsubishi Heavy Industry Group's Spectra website How new technology is democratizing access ...
3
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1answer
160 views

Why does the F9 second stage roll back and forth during deployment of each RADARSAT satellite?

GIF Watching the SpaceX video RADARSAT Constellation Mission after T+ 52:00 we can see at least the first two satellites deploy. In each case, the second stage ...
5
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1answer
116 views

Moon's South Pole-Aitken basin mass anomaly, how to reconcile “isostatic equilibrium” with “heavy metal not sinking”?

The recent Phys.org piece Mass anomaly detected under the moon's largest crater is a review of a recently published and paywalled Geophysical Research Letter Deep Structure of the Lunar South Pole‐...

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