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ikrase
  • Member for 3 years, 1 month
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53 votes

Why is the supply of RTGs running short?

32 votes
Accepted

What actually is RP-1, and how is it different from any other hydrocarbon liquid fuel?

29 votes

Is there any reason that we have not sent a small mammal to Mars?

28 votes

Why is there a white panel in astronaut’s fabric headcover they wear inside the hard helmet?

27 votes
Accepted

How many ion thrusters would be needed to accelerate a 1000 tonne craft at 9.8m/s²?

24 votes

Using of the rocket propellant for engine cooling

22 votes
Accepted

Why is Nasa retiring ISS

22 votes

Why can't cryogenic oxygen and cryogenic kerosene be "stored" together?

21 votes

Why use a Mars orbital Earth return vehicle for sample return?

17 votes

Why do you need a heat shield on Mars entry if the atmosphere is so thin?

17 votes

Why do many comets & asteroids keep moving through the solar system, but space ships need fuel to do so?

17 votes

What's the typical temperature of a reactor core in a nuclear thermal rocket?

13 votes

Why exactly does Curiosity's RTG make more electricity on cold days?

13 votes

Is the concept of the Epstein Drive based on actual theorized scientific research which is considered plausable?

12 votes

How easy is it to use liquid nitrogen dioxide as an oxidizer?

12 votes
Accepted

Heat shield on Venus

12 votes

Using nuclear detonations for propulsion

11 votes

Is escape from earth, hyperbolic in reality?

10 votes

Do converging-diverging engine nozzles need to be bell-shaped?

8 votes
Accepted

Could the Dream Chaser or Space Shuttle fly/have flown to the Moon with boosters on the orbiter's side?

7 votes

Can a spacecraft be propelled by two electromagnets of different size?

6 votes
Accepted

Could pressurized ionized oxygen be used as a fuel source for an ion thruster?

6 votes

Why can I not use stoichiometry to calculate the O/F ratio of my rocket?

6 votes
Accepted

What was the influence of the military in the decision to use kerosene as fuel for LOX?

6 votes

Why sugar is not commonly used as fuel in hybrid rocket engine?

6 votes

Capsule heat shielding made of Aerogel?

5 votes

Petrol as rocket fuel

5 votes
Accepted

What are the cutting edge materials & strategies which could be used for radiation shielding on long-duration missions?

5 votes

Is there, or has there ever been anything remotely like an electron microscope in space?

5 votes
Accepted

Would a small electron microscope in a cubesat work well in space at 400 km?