Activity for Stephanie
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
Designing a solar system to resemble the TRAPPIST-1 system What orbital parameters could I give seven Mars/Earth sized planets so they have stable orbits around a G-type star like The Sun, they need to fit between 0.5 AU and 1.7 AU. (more) |
— | over 7 years ago |
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Would it be possible for Mercury sized planets in the habitable zone to develop intelligent life? Let's use Mercury as an example, we can pretend it orbits in the habitable zone of the Sun, would Mercury's magnetic field be able to protect an Earth like atmosphere? And would the lower gravity mean larger creatures? Also by Earth like atmosphere I mean similar composition, not pressure. (more) |
— | almost 8 years ago |
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Skyscrapers on low gravity planets Would it be easier to build Skyscrapers on a planet with 50% of Earth's gravity, and the same atmospheric pressure of the Earth. I noticed someone asked why the planet has lower gravity, this is because the planet is smaller than Earth and less dense. I'll leave some details about the planet below. ... (more) |
— | about 8 years ago |
| Question | — |
Effects of an alien weather generator? An alien race wants to test out its new technology that modifies the atmosphere of Earth and other terrestrial planets, they decide to center it over Central Park, NYC. One of the first things they want to test is how the wind affects the environment. The weather modifier appears to be a large tower ... (more) |
— | about 8 years ago |
| Question | — |
Can a terrestrial planet have a long lasting hurricane like the great red spot? I want to create a terrestrial planet with a very long lasting hurricane similar to the great red spot, I assume the planet will have to be covered by ocean. Could there still be some small islands? If it's possible what natural factors might enable the hurricane to survive over 100 years? (more) |
— | about 8 years ago |
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Designing a planet that would have the greatest chance of developing silicon based life What conditions might make a planet more likely to develop silion based life, the factors I need to kmow are listed below Temperature of the planet The solvent that they can use in their biology The type of star the planet is likely to form around (more) |
— | about 8 years ago |
| Question | — |
What evolutionary factors could evolve a species which looks like a hybrid between bunny and octopus? I am creating a race of aliens that are amphibious and mammalian in detail, they have six tentacles, bunny ears and also fur covering their bodies. They are about 3-4 ft in length, if this species evolved naturally on a habitable planet, what evolutionary factors might make my species a real possibil... (more) |
— | about 8 years ago |
| Question | — |
What methods could this alien race use to terraform the Earth so it resembles their homeworld? Some information about their homeworld: Their homeworld, 0.34247 (M⊕) 0.54 G, 10156 km. The atmospheric pressure of their homeworld is 62% of the Earth's, and the planet has an average temperature of 87.6 kelvin. The atmosphere consists mainly of 68.1% Nitrogen 28.6% Methane 1.71% Carbon diox... (more) |
— | about 8 years ago |
| Question | — |
Would humans, and animals be able to survive on this planet? My question is pretty simple, all the details about the planet are pictured below. (more) |
— | about 8 years ago |
| Question | — |
Would animals from Earth be able to survive and reproduce on this planet? Some details about the planet and its moon plus the host star. Star: 0.85 Sol, 0.54% of the Sun's luminosity Planet: 0.04926 (M⊕) 4836 km, 0.34 G, Orbits the host star at 0.901 AU. The atmospheric pressure on this planet is 0.20% of the Earth's which consists of: 85.4% O2, 9.16% CO2, 3.89% N2, ... (more) |
— | over 8 years ago |
| Question | — |
How many Mars sized planets can form and remain stable in the habitable zone of a Sun-like star? By Mars sized I mean with masses between 0.10 (M⊕) and 0.25 (M⊕), the planets need to have independent orbits around the star. We can assume the habitable zone stretches from 0.70 AU, to 1.5 AU for a typical G type star like the Sun. I don't know if adding a gas giant to the system will cause in... (more) |
— | over 8 years ago |
| Question | — |
Designing animals to survive on a planet with a low atmospheric pressure? I'm trying to create a habitable planet but with a low atmospheric pressure, similar to Mars. But instead with 15 percent of Earth's atmospheric pressure, what traits can I give my animals so they have the best chances to survive? If the atmospheric composition is about the same as Earth and orbiting... (more) |
— | over 8 years ago |
| Question | — |
Could a gas giant have a stable orbit within the asteroid belt? By a stable orbit I mean not getting ejected by the other planets or ejecting them, Let's create a scenario where Neptune occupies an orbit in the asteroid belt at 2.76 AU, Ceres average distance from The Sun. Since the distance of the asteroid belt varies from 1.78 to 4.2 AU, I decided to use the or... (more) |
— | over 8 years ago |
| Question | — |
Would it be possible for life to exist and evolve on this hot Super-Earth? The planet is a Super-Earth with 1.839 Earth masses and an average surface temperature of 180.7 degrees farrenheight, the atmospheric pressure is 50 times more dense than Earth's and there's large oceans on its surface, surface gravity is 1.36 G, If life were to exist here, would its biochemistry hav... (more) |
— | over 8 years ago |
| Question | — |
Smallest planet that can maintain plate tectonics? I was wondering what is the smallest a terrestrial planet can be and maintain plate tectonics and generate a magnetic field, atleast to Earth's current age? (more) |
— | over 8 years ago |
| Question | — |
Which factors are more dominant when it comes down to atmospheric escape? I was wondering if a planet that has a higher escape velocity but lower surface gravity lose its atmosphere more faster/slower than a planet that has a higher surface gravity but lower escape velocity? Let's assume both planets have magnetic fields. (more) |
— | over 8 years ago |
| Question | — |
A biosphere that is based off of noble gases? I was just wondering if it would be possible for a planet to have life that only uses noble gases in their biology. Like for example breathing in certain noble gases like Argon or Krypton for energy, or plants that react noble gases for energy and release other release noble gases. (more) |
— | over 8 years ago |
| Question | — |
Evolution of eyesight on a planet with a Methane biochemistry? If we assume their homeworld is similar to Titan, but instead orbiting a Neptune sized gas giant and a bit bigger and receiving the same amount of Solar energy as Titan, The star is a main sequence G type star, and the moon has a surface gravity of 0.28 G's. The atmosphere isn't smoggy like Titan so ... (more) |
— | over 8 years ago |
| Question | — |
Effects of Lunar gravity on animal life? For my story I am working on, a peaceful alien race that is studying Earth wants to terraform the Moon by building a giant sealed dome over its entire surface, then they will create forests, deserts and oceans. Then they're going to import animals from Earth to the Moon's newly terraformed surface. W... (more) |
— | over 8 years ago |
| Question | — |
Stability of terrestrial planets orbiting in the Lagrangian points of Jupiter sized planets? Would it be possible for a terrestrial planet say atleast >0.3 Earth masses orbiting in the L3/L4/L5 and L1/L2 Lagrangian points of a Jupiter sized planet in the habitable zone of a Sun-like star remain stable for billions of years? Would this scenario be unlikely to occur naturally? And if it is sta... (more) |
— | over 8 years ago |
| Question | — |
Intelligent life on a Super Io? Would it be possible for a moon that receives a lot of tidal heating from its gas giant parent planet like Io to develop intelligent life? Assuming moon is big enough to support an atmosphere and is in the habitable zone. (more) |
— | over 8 years ago |
| Question | — |
Would aliens that evolved on low gravity planets be able to cope with Earth's gravity? Let's say an alien species discovered Earth and wants to land here and establish contact, however their homeworld's gravity is only 46 percent of Earth's, Would it be possible for them to be able to walk on Earth? Is it possible for them to adapt to Earth's gravity? They are 1-2 ft tall and walk on t... (more) |
— | over 8 years ago |
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Maximum amount of habitable moons possible around this Jovian planet? The gas giant has a mass of about 2.13 Jupiter masses in the habitable zone of a Sun like star 0.981 Sol masses, all the moons will need at least >0.12 percent of Earth's mass and a Mars like density to support an atmosphere for billions of years. I assume the largest moons will be around 0.3 Earth m... (more) |
— | over 8 years ago |
| Question | — |
Habitability and orbital stability of these moons? These moons orbit a Jovian planet with 0.52 Jovian mass and at 1.02 AU from a star with 0.98 Sol mass. 3.85 Days, 0.351 Earth, 0.68 G 15.4 Days, 0.242 Earth, 0.59 G 30.8 Days, 0.118 Earth, 0.44 G Is tidal heating enough to produce a molten core that will create a magnetic field for all three moon... (more) |
— | over 8 years ago |
| Question | — |
Would it be possible for a planet orbiting a blue supergiant to develop intelligent life? In Halo series there is an intelligent race called Unggoy that evolved on a planet caled Balaho orbiting a blue supergiant called Tala, I would like to know if it would be possible for an intelligent civilisation to evolve on a planet orbiting a blue supergiant. (more) |
— | over 8 years ago |
| Question | — |
Hydrogen sulfide replacing water? Would it be possible to have alien life use Hydrogen sulfide instead of Water? I assume they are still carbon based. Also for a sunlike star what distances should this planet or moon be located? (more) |
— | over 8 years ago |
| Question | — |
Hydrogen peroxide based life? Would it be possible to replace water with hydrogen peroxide on an Earth like planet? I know water and hydrogen peroxide are similar, Also if this configuration is possible what may cause an Earth like planet to evolve life dependent on hydrogen peroxide instead of water? (more) |
— | over 8 years ago |
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Would life still be possible on Earth if its atmosphere suddenly became as dense as the Venusian? Assume that the atmospheric concentration is still the same 78.09% nitrogen, 20.95% oxygen etc, except now just as dense as the Venusian atmosphere. Would humans be able to survive in this atmosphere? (more) |
— | over 8 years ago |
| Question | — |
Can a planet have 10x Earth mass, 4x Earth gravity and support intelligent life? In the Mass Effect series there's a terrestrial planet called Dekuuna with 10 times the mass of Earth, a surface gravity of 4G and a native intelligent race. I was just wondering if it was possible for a planet like that to exist in reality, and if yes, what are some factors that might lead to its fo... (more) |
— | over 8 years ago |
| Question | — |
Evolution of animals' eyesight on habitable planets orbiting TRAPPIST-1? Recently there have been up to two habitable planets discovered around the star TRAPPIST-1, if animal life was able to evolve on either planets how would eyesight evolve under such a dim star? How much different would it be compared to the eyesight of Earth animals? More information about the star c... (more) |
— | over 8 years ago |
| Question | — |
Evolution of an intelligent prey species I just wanted to know something relatively simple. What evolutionary factors could lead to an alien prey species to develop human like intelligence, and by prey species I mean a species like bunnies. (more) |
— | over 8 years ago |
| Question | — |
What are the evolutionary factors that could create a species that looks like E.T.? Watching E.T. I was wondering what evolutionary factors could cause a species to have the appearance of E.T., like the environment he would likely live in and the gravity of his homeworld. (more) |
— | over 8 years ago |
| Question | — |
Skin tones for humanoid species living on planets orbiting different types of stars? For the following stars -A Class -F Class -G Class -K Class -M Class What are the most likely skin tones for each type of stellar class? Also for their eyesight how different is it to vary for each class of star? assuming the planet orbits at a distance to its star so it recieves the same amo... (more) |
— | over 8 years ago |
| Question | — |
Is this planet possible in real life? In the Halo series there's a habitable planet called Harvest with a diameter of 4,012 kilometres, and gravity 99% of Earth's, though the planet only has 9% of Earth's mass. If such a planet is possible, what are some factors that might lead to its formation? Some more information on the planet can ... (more) |
— | almost 9 years ago |
| Question | — |
Minimum distance a planet can remain habitable from a sun-like star? This one source is stating a desert planet the size of Earth could maintain habitability at 0.38 AU from a sun-like star, but I highly doubt this is possible. What are some factors that could make this possible? The source for my information is http://arxiv.org/abs/1304.3714 Also for a solar-like s... (more) |
— | almost 9 years ago |
| Question | — |
Is this moon system stable? The host star for this hypothetical system is 1.05 (M☉) The gas giant is 20 percent more massive than Jupiter and orbits at 1.40 AU, now I need to know if these three orbits are stable around the planet Moon One, 0.80 (M⊕) Orbits the host planet every 5 days Moon Two, 0.56 (M⊕) Orbits the ho... (more) |
— | almost 9 years ago |
| Question | — |
Is this planetary system stable? The host star has a mass of 0.90 M$\odot$ I'll refer to this star as Helios. I'll refer to the planets as Helios One, Helios Two, etc. Helios One is 0.55 M${\oplus}$ and orbits at 0.75 AU. It's eccentricity is 0.012. Helios Two is 0.94 M${\oplus}$ and orbits at 1.08 AU. Its eccentricity is 0.015 H... (more) |
— | almost 9 years ago |
| Question | — |
Would an aquatic civilisation be able to exist under Europa's ice sheet? If yes, what are some possible ways they could break through the ice and explore the surface? (more) |
— | almost 9 years ago |
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What is the fastest amount of time a technologically advanced species can evolve? I am creating a hypothetical race of aliens native to a planet orbiting an F class star; the mass of the star is 1.50 (M☉). Would this star live long enough to allow the evolution of intelligent life on a planet orbiting it? (more) |
— | almost 9 years ago |
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Is it possible for a star similar to the sun to only have terrestrial planets orbiting it and no gas giants? What are some possible ways this could happen? (more) |
— | almost 9 years ago |
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What is the maximum distance a planet orbiting the sun could have liquid water on its surface? Lets say there's a super earth orbiting the sun at 3.00 AU, how thick would its atmosphere have to be to trap enough heat to make the planet warm enough for liquid water to flow on its surface? (more) |
— | almost 9 years ago |
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Is there any biochemistry that could support life on a hypothetical moon of Planet Nine? I know water would be out of the question, but what about liquid nitrogen or liquid hydrogen, Would silicon work instead of carbon? (more) |
— | almost 9 years ago |