What planets are bigger than Earth?

The four gas giants are larger than Earth: Jupiter, Saturn, Uranus and Neptune.

Venus is slightly smaller, but very nearly the same size as Earth. Mercury and Mars are smaller than Earth.

So there are 4 planets larger than Earth in our solar system, and they are the four gas giants.solar_system_3

Why hasn’t the oceans been thoroughly researched before we attempt to go to Mars?

NASA_Mars_RoverWhile it is true that building a city under the ocean would be easier than going to Mars, going to Mars isn’t going to stop oceanographic research. One does not cancel out the other. It’s not like we are pulling out funds from researching the ocean so we can go to Mars. There are things still to be discovered under the sea. There are things still to be discovered in space. Both will go on because we have billions and billions of people and some people like studying the oceans and some people like studying space!

How can Mars be colonized when it doesn’t have a magnetosphere?

Exactly the disappointing truth. It can’t. Since Mars is too small, the core cooled down long ago and therefore the organized magnetosphere doesn’t exist. Put as much atmosphere you want and it will still be blown away and not protect us from dangerous rays from the sun. We can only “colonize” the same way we “colonized” the Moon or the International Space Station: staying indoors!

Mars outpost near mesa
This image suggests how such a martian “motor home” might be realized. Providing transportation and housing for a crew of two to four human explorers, this pressurized rover would offer stability, visibility, storage, and a means for generating power for locomotion and electrical systems. A pair of wing-like solar arrays atop the rover help to meet some of the energy needs, and the transparent windshield ports have been coated to shield the interior from ultraviolet light and provide additional visual contrast to Mars’ rust-colored landscape.

How would we protect future human civilization on Mars from cosmic radiation?

A great question, and there’s no easy solution to this critical problem!

The sun gives off deadly radiation all the time. On Earth we are shielded from it here because of our magnetic poles and this is what causes the Aurora borealis (northern lights).

On Mars this will be a deadly problem whether or not there would be an atmosphere like Earth.

The best solution, like on the International Space Station, stay indoors as much as possible!

Besides, I don’t think we will be able to terraform Mars!

How long before the expansion of the Universe causes our Earth to drift away from the Sun?

What if Earth animals were introduced to a terraformed Mars, how would they evolve on the Red Planet?

Terraforming Mars is a long ways off. In fact, it’s highly unlikely that it would ever be possible and since there’s no organized magnetic field on Mars, any life that walked outside would be exposed to lethal radiation from the sun with or without an atmosphere.

That being said, life can evolve even with high amounts of radiation under certain conditions. Over time, life finds a way to exist even in extreme conditions. Evolution would follow a random pattern – the fittest of those would survive and the less fit would perish. Survival of the fittest is what drives Evolution, whether on Earth or on Mars, forward.

Are there other conscious-minded creatures on another planet or solar system?

Are there other conscious-minded creatures on another planet or solar system?

It is highly likely. Yes. Do we know for sure? No.

We have no proof as of date of any life outside our tiny little Earth. We don’t even have any evidence of past life from anywhere other place than Earth.

Will we ever know? We hope so. Our best chance is finding some microbes on Titan or some other moon in our solar system. That would be a huge revelation!cassini