Category Archives: Mars

Do aliens come on Earth or Mars and we sometimes see them and sometimes not?

No alien that we know of has ever come to Earth.

As far as not seeing aliens, some aliens are microbes. Probably most are microbes. It’s hard to see microbes without a microscope.

Why do you want to go to Mars?

I don’t want to move to Mars. It’s a very dangerous environment, you’d be indoors all the time or else wearing a spacesuit for short adventures outdoors. I don’t even think it’s advantageous for humans to go to Mars at all when we could just as well, and for much less expense, send our probes and robot rovers there instead. There is no good scientific reason to go to Mars.

People will go, however, because not everyone is scientifically minded.

Perhaps human race’s home was not Earth in the first place, but in another planet, and we came here to prevent extinction

Mechanical, intentional interstellar travel is unlikely since the distances are far too great to imagine. The best anyone could achieve is interplanetary travel within one’s own solar system. Therefore, if we pass the buck and say life didn’t start here but started somewhere else and arrived here, it would have had to arrive on a rock or asteroid as a microbe and somehow survive a fiery entry through Earth’s atmosphere and it would have had to survive the vacuum and temperature extremes of space. If the rock came from outside the solar system it would have had to survive a long, long time.

Would you rather live on Mars or on the Moon?

Since both the Moon and Mars would require a carefully constructed closed airtight environment or else people will die, I’d take the Moon because it’s easier to leave the Moon and go back to Earth if something starts to go wrong. On the other hand, it’s not so easy to leave Mars and go back to Earth.

Partial lunar eclipse

I took this photo from the street in front of my house in Amarillo, Texas, during a partial lunar eclipse. You can see the upper left corner of the moon is darker. The green light in the foreground is a streetlight on Pagoda Drive, Amarillo.

Andy Weir’s “The Martian” provides a template for what a realistic mission to Mars could be like, yet most science news I hear about actual proposed missions appear to be just a big Apollo. Don’t we have to do it in Weir’s way to succeed?

No. Andy Weir’s “The Martian” was science fiction. It was a possibility, but not a reality at present. Don’t confuse science fiction with reality.

We shouldn’t go to Mars (in my opinion) but we are going anyway. That being said, we have to wait and see how it plays out in reality, not in sci-fi.

If Mars were somehow pulled into the Goldilocks zone, and assuming it was not on a collision course with the Earth, could it be rendered habitable?

My opinion about Mars is evolving, it would seem.

I used to think it was useless for us to go to Mars, and it still is. However, what’s changing is that we are going to go to Mars anyway, and that’s really kind of a revelation that we will eventually become a multi-planet species.

The problem with Mars, I think, is it’s too small.

The size of the planet means two things: one, the planet’s central core cooled off early on it its history, essentially destroying the magnetic field of the planet, and two, without enough gravity you’d need at atmosphere much deeper than Earth to achieve the same pressure.

There’s a third problem, too. No nitrogen to speak of.

These problems would not be solved by dragging the planet closer to the sun. It is basically, as far as we can tell, a dead planet.

Assuming that there were humans on Mars, how long would it take for a voice transmission from Earth to reach them? Would the times be different for other electronic forms of communication?

Transmissions from Mars to Earth and visa versa happen at the speed of light. However, Mars is sometimes near Earth and sometimes on the other side of the sun. Therefore, depending on where Mars is in relation to Earth in our orbit around the sun, transmission times change from 4 minutes to 24 minutes. If Mars is close to Earth in orbit around the sun it’s 4 minutes. If Mars is on the other side of the sun from Earth in our orbit, it’s about 24 minutes.