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Answer a question more than 60 days later with score of 5 or more. This badge can be awarded multiple times.

HopDavid

15.1k38 silver badges75 bronze badges

earned this badge 11 times.

Why does $I_\text{sp}$ on an upper stage matter so dramatically?

Awarded Jan 24, 2020 at 7:55

How deep is the force well of L4 and L5 Lagrangian Points of Earth-Sun set?

Awarded May 11, 2018 at 9:56

Is it possible to "map" the Interplanetary Transport Network?

Awarded Sep 27, 2017 at 7:23

Does a satellite naturally turn in phase with its orbit, always facing Earth?

Awarded Jul 14, 2016 at 2:39

Feasibility of colonising Ceres?

Awarded Dec 13, 2015 at 1:51

What technological hurdles prevent the development of a space gun?

Awarded Aug 16, 2015 at 18:24

Could the sun be used as a gravity assist outside the solar system (with current tech)?

Awarded Jul 9, 2015 at 7:55

Did the space shuttle fly straight "up" when leaving Earth?

Awarded May 31, 2015 at 23:37

Would a point-to-point suborbital spaceflight have a "negative" perigee?

Awarded Dec 29, 2014 at 7:26

How fast will 1g get you there?

Awarded Jul 22, 2014 at 9:49

Where could we build a space elevator today (2014)?

Awarded Jun 3, 2014 at 8:17

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