All Questions

5
votes
0answers
80 views
+100

Was this the first-ever photo of a full moon very close to lunar new year?

Limiting the concept of "lunar new year" to "Chinese New Year" (since there are many lunar and lunisolar calendars, the latter of which the traditional Chinese one is a widely used example), is this ...
0
votes
1answer
52 views
+50

Maximum size for a Ion thruster solar array

In other questions I have asked about using a solar sail to double as a reflective mirror to provide light to an ion engine. What would be the maximum size or surface area of a parabolic sail where ...
2
votes
0answers
97 views
+50

What is the universal emblem that represents space exploration?

I am interested if there is an official emblem that represents space exploration worldwide? Are there any small pictures that everyone would recognize or associate to space exploration? I had more ...
1
vote
1answer
283 views
+50

Is a ballistic blimp entry possible on this way?

Could the entry of Mars with balloons work by inflating to equalize with the atmospheric air pressure, while establishing buoyancy before meeting the ground? Would a balloon pop if dropped from space?...