Question: On every planet SG-1 travels to, plants are the same color as those on earth. Shouldn't plants have different colors on different planets?
lionhead
29th Dec 2020
Stargate SG-1 (1997)
Answer: There have been times where plants are different color, but generally speaking, green is evolutionarily better at capturing the best amount of sunlight energy for photosynthesis. Thus, plants evolved to have green chlorophyll on other planets as well.
Answer: Planets with Stargates were chosen because of the similarities to Earth.
That's ridiculous. Stargate command would never choose a planet based on similarities to earth unless it would to make sure it was safe to travel to.
Stargate command had nothing to do with where the Stargates were. The answer is saying those that placed the Stargates throughout the galaxy chose Earth-like planets. More accurately though, inhabitable planets, which tend to be similar to Earth.
The Ancients put the Stargates on planets, and since their physiology was very similar to modern Earth humans, it stands to reason that they only chose to put planets which could support a similar lifeform. Hence, why most planets or moons resembled Earth at some point in their history.
Huh? First of all, you're trying to surmise what a fictional agency would do. Second, SG-1 and other SG teams frequently visited both Earth-like planets and planets with toxic conditions.
Stargates were placed at worlds that were similar to Earth, this mostly due to the ancients establishing themselves on Earth over 50 million years ago and finding planets to colonize from there. Some worlds may have become inhospitable over the millions of years after the stargate was built though. It is quite possible all these planets were seeded with life from Earth and planets close to Earth's appearance, hence the same vegetation and animal life.
22nd Oct 2017
Stargate SG-1 (1997)
Question: When SG-1 travels to alien planets they always experience earth like gravity. Shouldn't they be experiencing different gravity on different planets?
Answer: Basically, if a planet has the same mass and size, it will have the same gravity. Since the Stargates were placed on habitable planets, it's likely they placed them on planets with the same gravity. Even if the planet's varied in mass or size, a planet's gravity in relations to Earth can be calculated as m/r^2where m is the planet's mass compared to Earth's mass and r2 is the planet's radius (compared to Earth's) squared. So if a planet had 50% the mass and 70% radius of Earth, gravity would be 0.5/0.7^2 which would be 1.02 times the gravity of Earth (or roughly the same).
Answer: Goldilock zone.
What does this answer have to do with the question?
Nothing, just someone trying to be clever.
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Answer: The Aliens choose planets that were similar to Earth. They possessed human beings, so they needed worlds with vegetation and atmosphere. In the original movie, their race was dying and humans were the only ones who could give them eternal life - they took many inhabitants as slave labor.