user avatar
user avatar
user avatar
Oscar Lanzi
  • Member for 3 years, 5 months
  • Last seen this week
46 votes

Did Apollo 13 produce any scientific results?

32 votes
Accepted

What happened to the Apollo 1 rocket?

30 votes

Do other planets and moons share Earth’s mineral diversity?

25 votes

Are the computers on Pioneer 10 & 11 still running?

25 votes
Accepted

Did any spacecraft ever use the Sun's gravity for acceleration?

21 votes

What equipment was taken from Earth to the surface of the Moon and back?

18 votes

Is Mohs scale of mineral hardness applicable for rocks and minerals of terrestrial planets other than Earth?

18 votes
Accepted

Was Venus once seriously believed to be lush under its cloud cover?

15 votes

Are there any vegetarian astronauts?

13 votes
Accepted

How long is a day on the Moon?

12 votes

Why are there mountains/mounds in the centre of craters on the lunar surface?

11 votes

What is the density of the earth's atmosphere at an altitude of four hundred kilometers?

11 votes

Is there any reason Cyanobacteria or Lichens can't survive on Mars?

11 votes

What target is the most difficult to reach in the solar system?

11 votes
Accepted

Where will we get nitrogen in space?

11 votes

How can a hefty sand storm happen in a thin atmosphere like Martian?

10 votes
Accepted

How could the presence of 3He be detected on the lunar surface?

10 votes

Is there an intuitive reason for why the shape of the orbit at perigee is the mirror image of that at the apogee?

10 votes
Accepted

Difference between "mafic floor" and "olivine-bearing floor" in Jezero crater? (Perseverance landing site)

9 votes
Accepted

How much mass can be put in an L4 or L5 and it still maintain reasonable stability?

8 votes
Accepted

Why is the gas giant grand tour interval 175 years when the synodic period of Uranus and Neptune is 171 years?

8 votes

Compounds causing the various colors on Pluto's surface?

8 votes

What forms of water ice have been observed and verified in the solar system?

7 votes
Accepted

Sources of Xenon or other noble gases in space?

7 votes

Has there ever been an astronaut that bailed out on going to space last minute?

7 votes
Accepted

Calculate flight path angle given semi-major axis, eccentricity and distance from the focal point

7 votes

How brightly does Venus's hot surface glow at night? Could you see it? Could you see well enough to walk around?

6 votes

Is the surface environment of Venus corrosive?

6 votes
Accepted

Does Kepler's Method for Determining Time of flight between two True Anomalies break down with eccentricities approaching 1?

6 votes

Have there been any setbacks due to COVID-19-- like delays or data-loss?