User DrZ214 - Space Exploration Stack Exchange

32 votes

2 answers

3k views

How can a sounding rocket accurately take the temperature of the atmosphere while flying through it at high speed?

asked Jan 21, 2016 at 4:36

27 votes

4 answers

7k views

Why do deep space probes have to be sterilized?

asked Aug 7, 2015 at 16:10

24 votes

2 answers

3k views

How does Venus' thick atmosphere survive against the solar wind?

asked Feb 1, 2016 at 10:29

19 votes

1 answer

8k views

What is so hard about making a throttleable large rocket engine?

asked Jul 24, 2015 at 21:13

18 votes

2 answers

2k views

How big a weight problem is ice sticking to a rocket?

asked Jul 20, 2015 at 22:41

17 votes

4 answers

4k views

For a typical Shuttle mission, how much solid fuel is leftover at SRB separation?

asked Aug 30, 2015 at 1:18

15 votes

4 answers

6k views

Is LMP-103S truly a viable replacement for Hydrazine?

asked Jun 7, 2015 at 4:28

14 votes

3 answers

3k views

Did we know the gas planets were truly gaseous before Pioneer 10?

asked May 27, 2015 at 2:49

14 votes

1 answer

3k views

What solid fuel was used in the Katyushas rocket artillery of WW2?

asked Nov 16, 2016 at 15:59

12 votes

2 answers

4k views

Why does the Soyuz spacecraft's parachute have so many lines?

asked May 29, 2015 at 1:05

12 votes

4 answers

11k views

Why do pressure-fed systems have to be pressurized with helium or nitrogen?

asked Jun 3, 2015 at 2:55

12 votes

1 answer

664 views

Was there ever a non-sterilized probe sent to a celestial body?

asked Aug 9, 2015 at 2:12

11 votes

1 answer

1k views

How were the Space Shuttle missions named?

asked Jan 3, 2016 at 13:59

10 votes

3 answers

1k views

A cryo tank within another cryo tank...is it a sound engineering concept?

asked Jul 20, 2015 at 7:28

10 votes

1 answer

1k views

How is blow-back prevented in monopropellant chemical rockets?

asked Jun 5, 2015 at 18:24

10 votes

2 answers

627 views

Was Hipparcos Satellite really necessary? Can't Hubble do everything that Hipparcos did?

asked Jun 12, 2015 at 1:21

9 votes

2 answers

3k views

What is the correct thrust curve for a solid rocket with a simple circular hole, and why?

asked Aug 29, 2016 at 6:25

9 votes

2 answers

2k views

How are spacecraft engineered to prevent overheating?

asked Sep 10, 2016 at 20:49

9 votes

2 answers

508 views

In Apollo hardware, why were sump tanks needed?

asked Aug 24, 2022 at 14:08

8 votes

2 answers

4k views

What are the energy-to-mass ratios of some fuels/oxidizers, when including the oxidizer?

asked May 14, 2018 at 4:08

8 votes

1 answer

829 views

Why is space junk so persistent in LEO?

asked Jun 14, 2015 at 1:42

8 votes

3 answers

1k views

What were the highest quality photos and knowledge of Uranus and Neptune before Voyager?

asked Jul 19, 2015 at 1:07

7 votes

1 answer

861 views

How much power does the Voyager radio dish draw?

asked Jul 18, 2015 at 3:06

7 votes

2 answers

2k views

Which is overall more expensive to operate for a final rocket stage? LH2/LOX or hypergolics like UDMH/N2O4?

asked Jul 18, 2015 at 21:04

7 votes

1 answer

2k views

What exactly does it mean to human-rate a rocket? As opposed to the escape system?

asked Jul 23, 2015 at 5:03

7 votes

1 answer

923 views

What was the first large rocket to use APCP solid fuel?

asked Aug 30, 2015 at 22:52

6 votes

3 answers

2k views

Are cold gas thrusters viable for model rockets?

asked Apr 28, 2016 at 23:43

6 votes

2 answers

6k views

What does "self-pressurizing" mean in regards to propellant tanks?

asked May 29, 2015 at 21:53

5 votes

1 answer

10k views

What is the flyaway cost of a Soyuz and Proton Rocket?

asked May 28, 2015 at 21:53

5 votes

3 answers

1k views

How does a radiator work fast enough on a space craft?

asked Apr 17, 2021 at 19:59

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41 Questions

How can a sounding rocket accurately take the temperature of the atmosphere while flying through it at high speed?

Why do deep space probes have to be sterilized?

How does Venus' thick atmosphere survive against the solar wind?

What is so hard about making a throttleable large rocket engine?

How big a weight problem is ice sticking to a rocket?

For a typical Shuttle mission, how much solid fuel is leftover at SRB separation?

Is LMP-103S truly a viable replacement for Hydrazine?

Did we know the gas planets were truly gaseous before Pioneer 10?

What solid fuel was used in the Katyushas rocket artillery of WW2?

Why does the Soyuz spacecraft's parachute have so many lines?

Why do pressure-fed systems have to be pressurized with helium or nitrogen?

Was there ever a non-sterilized probe sent to a celestial body?

How were the Space Shuttle missions named?

A cryo tank within another cryo tank...is it a sound engineering concept?

How is blow-back prevented in monopropellant chemical rockets?

Was Hipparcos Satellite really necessary? Can't Hubble do everything that Hipparcos did?

What is the correct thrust curve for a solid rocket with a simple circular hole, and why?

How are spacecraft engineered to prevent overheating?

In Apollo hardware, why were sump tanks needed?

What are the energy-to-mass ratios of some fuels/oxidizers, when including the oxidizer?

Why is space junk so persistent in LEO?

What were the highest quality photos and knowledge of Uranus and Neptune before Voyager?

How much power does the Voyager radio dish draw?

Which is overall more expensive to operate for a final rocket stage? LH2/LOX or hypergolics like UDMH/N2O4?

What exactly does it mean to human-rate a rocket? As opposed to the escape system?

What was the first large rocket to use APCP solid fuel?

Are cold gas thrusters viable for model rockets?

What does "self-pressurizing" mean in regards to propellant tanks?

What is the flyaway cost of a Soyuz and Proton Rocket?

How does a radiator work fast enough on a space craft?