Space Exploration

Notable Question

 Notable Question
Question with 2,500 views. This badge can be awarded multiple times.
Awarded 2810 times.
What is the cost of the propulsion system and thrusters as a % of the total satellite?
Awarded 2 hours ago
What kept the Soviets from going to the Moon (before the US)?
Awarded 7 hours ago
How does electrical safety system work on ISS?
Awarded Nov 23 at 5:37
Could a Mars rover go to Phobos or Deimos instead?
Awarded Nov 22 at 0:26
Person falling from space
Awarded Nov 21 at 5:56
Are any Earth orbits in continual shadow of the Earth?
Awarded Nov 21 at 2:58
Was Starship’s “launch window” administrative, rather than due to orbital mechanics?
Awarded Nov 20 at 23:58
Did we know the gas planets were truly gaseous before Pioneer 10?
Awarded Nov 19 at 6:26
How much of a rocket's energy is used to achieve altitude vs horizontal velocity?
Awarded Nov 19 at 5:39
What makes Falcon Heavy with 3 booster 4 times more capable than single booster F9?
Awarded Nov 18 at 22:27
Voyager Earth to Jupiter journey time
Awarded Nov 18 at 4:21
Term for deformation due to gravity
Awarded Nov 18 at 2:19
Could the Apollo LM abort mode be engaged after touchdown? What would have happened if it was?
Awarded Nov 16 at 22:55
What were the hammerhead cranes used for?
Awarded Nov 16 at 17:47
What is the velocity of the ISS relative to the Earth's surface?
Awarded Nov 16 at 2:57
What is the largest object/mass that can survive entry into the earth's atmosphere from space without heating to 40 degrees C, or above?
Awarded Nov 15 at 9:16
Apollo Guidance Computer (AGC) Compiler?
Awarded Nov 14 at 19:56
What percentage of overall fuel does a rocket burn up to get to max-q?
Awarded Nov 11 at 23:27
Gravitational field of the Moon and Earth
Awarded Nov 11 at 20:20
How (actually) do sub-cooled propellants reduce cavitation within turbo pumps and make feed easier?
Awarded Nov 11 at 17:33
Apollo 13's plutonium RTG re-entry into the Tonga Trench: Good shootin' or good luck?
Awarded Nov 10 at 18:32
Transformation between ICRF and Fixed in STK
Awarded Nov 9 at 17:41
Why are the Martian poles not covered by dust?
Awarded Nov 8 at 8:48
Why do the boot prints on the moon appear bright in some photographs or film?
Awarded Nov 7 at 14:33
What is the most expensive part of a rocket?
Awarded Nov 3 at 1:21
Why does the Curiosity rover camera image resolution have "milliradians" as a unit?
Awarded Oct 30 at 17:11
Re-entry Heat Shield Alternative
Awarded Oct 29 at 5:10
Why does the Juno spacecraft flyby Earth on the way to Jupiter?
Awarded Oct 28 at 9:17
Before we build a Mars colony, why don't we build a 100% self-sustainable test colony in the Antarctic?
Awarded Oct 25 at 0:01
What was the purpose of the small red tank attached to the Titan-Centaur launcher?
Awarded Oct 24 at 12:32
Pollution by rockets and missiles
Awarded Oct 23 at 9:50
Is there any evidence from previous missions to asteroids that said asteroids have minable minerals?
Awarded Oct 21 at 22:50
What are the advantages of building a human colony on Mars vs the moon?
Awarded Oct 19 at 15:30
Earth re-entry from orbit by a sequence of upper-atmosphere dips to reduce kinetic energy?
Awarded Oct 19 at 13:18
What is the largest antenna deployed in space?
Awarded Oct 18 at 22:47
How much Delta-V is needed for Orbital Maintenance?
Awarded Oct 18 at 22:35
Mass, Chamber pressure and cooling type of Rutherford Engine
Awarded Oct 18 at 0:30
Do larger rockets tend to have a better mass ratio due to the square cube law?
Awarded Oct 13 at 20:16
Why is one Starlink satellite not following the adjacent one in this image?
Awarded Oct 11 at 23:11
What Gravity does the Sun affect items with at the distance of 1 AU?
Awarded Oct 11 at 22:28
Lambert's problem solution: optimal transfer time
Awarded Oct 11 at 1:26
How to see Iridium Flares (if possible) in 2020 and beyond?
Awarded Oct 6 at 21:41
(post deleted or otherwise unavailable)
Awarded Oct 5 at 10:07
What assumptions were made about the sphericity of the Moon for the Apollo program?
Awarded Oct 2 at 17:50
Why were they using segmented boosters on Space Shuttle?
Awarded Oct 1 at 12:30
Could a spacecraft take off from Earth using nuclear thermal rockets?
Awarded Sep 30 at 1:35
How did fully-suited astronauts enter the Space Shuttle and sit down in 1 g vertical vs horizontal?
Awarded Sep 29 at 21:48
What's a Brouwer-Lyddane mean semi major axis, or any other, for an orbit in a lumpy gravity field?
Awarded Sep 28 at 15:06
Is it scientifically possible to briefly walk on the moon bare footed?
Awarded Sep 27 at 17:40
Teleporting an object into geosynchronous orbit
Awarded Sep 25 at 1:10
Calculating a de-orbit burn, is this problem written correctly?
Awarded Sep 24 at 21:20
What are the movable-plastic-bag-looking things on the nose of Shuttle?
Awarded Sep 23 at 5:21
What does the ISS look like by night?
Awarded Sep 22 at 1:31
When has hydrogen peroxide been used in rocketry?
Awarded Sep 21 at 0:20
High resolution images of surfaces of other planets and moons
Awarded Sep 20 at 19:56
Why would astronauts need a wristwatch and a separate timer?
Awarded Sep 20 at 19:42
Rao contour nozzle: Calculate throat and exit angle?
Awarded Sep 19 at 14:33
Starship Flame trench
Awarded Sep 19 at 2:35
Reasons behind Soviets Using Prolog Programming Language for Buran Space Shuttle?
Awarded Sep 18 at 18:06
What is the return speed of the Falcon 9 booster?
Awarded Sep 16 at 7:51
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