“… there are no major technological barriers keeping us from harvesting the resources of the Moon and asteroids. All the barriers are financial.”
Mercury viewing
Opportunities to see Mercury are rare. Right now, it is reaching its greatest elongation and is in an optimal position for viewing shortly after sunset.
EarthSky | Updates on your cosmos and world
Insight finds a mystery
Twice each day, something strange happens to the atmospheric pressure on Mars.
Opportunity rests
So many odes to Oppy are popping up today. It’s heartening to see the influence this tough little robot had on so many.
Ars Technica Image: Opportunity at its final resting place in Perseverance Valley, courtesy of NASA
The challenge of writing science fiction
“Writing science fiction is a race between the author’s imagination and the progress of science and history.”
Video clip 16: Step outside
The kids take their first steps on the Martian surface.
background: illustration by Luis Peres for Scratching the Surface