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5

There are a lot of specific factors that would be relevant for answering this. Here are a few: What is the composition of the planet's atmosphere? Is there any soil/regolith and what is it made of? Does the planet have plate tectonics? (This is indirectly relevant for answering some of the above questions.) Is there liquid water on the planet? Is there a ...

8

In general space based plants will probably be hydroponics so most likely initial agriculture will be indoors in vertical farms. Possibly using mechanically harvested/processed materials to carefully expand the setup but certainly more productive of human labor to grow high yield plants in optimal conditions than hardier specimens outdoors. If the outdoors ...

12

Ignoring the infrared radiation aspect of your question, what you are describing is a situation not too dissimilar to what exists in many parts of Australia. The extreme degree of weathering that has occurred in Australia over millennia has left the soils in many parts of Australia leached of nutrients. Over time, native plants adapted to this situation to ...

0

Lets just do some order of magnitude estimation: 4.3 million km / 100 days = 500 m/s $\frac{1}{2}$(10 billion tonnes)(500m/s)2 = 1.25 × 1018 J to move the comet to Venus. For comparison, the Tsar Bomba, the biggest nuclear bomb ever detonated, was only 2.4 × 1017 J, and even if it was teleported to the comet now, not all of that energy would go into moving ...

2

Can VLF be used to create a Mars barrier? The short answer is no because Mars does not have an intrinsic magnetic field, thus no uniform dipole magnetic field to generate a magnetosphere. I wrote an answer about Jupiter that may be of interest as well at https://physics.stackexchange.com/a/142922/59023. In the Earth's magnetosphere, the VLF frequency range ...

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