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Posts by L.Dutch - Reinstate Monica‭

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Rigorous Science How do ballistic trajectories work in a rotating cylinder world?

For the sake of fixing some image in your mind, imagine you want to practice some sport in a rotating cylinder world: whether it be launching a javelin, strike a tee at the golf club or scoring a 3...

7 answers  ·  posted 5y ago by L.Dutch - Reinstate Monica‭  ·  last activity 5y ago by L.Dutch - Reinstate Monica‭

Question physics
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Q&A Why do flying saucers have to spin while flying?

Stabilization by gyroscopic effect, plain and simple. A gyroscope (from Ancient Greek γῦρος gûros, "circle" and σκοπέω skopéō, "to look") is a device used for measuring or maintaining orientati...

posted 4y ago by L.Dutch - Reinstate Monica‭  ·  edited 4y ago by HDE 226868‭

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Q&A On our way to Mars: how do we do the laundry?

A human crew of 6 has been sent on mission to Mars The lowest energy transfer to Mars is a Hohmann transfer orbit, which would involve an approximately 9 month travel time from Earth to Mars, a...

13 answers  ·  posted 4y ago by L.Dutch - Reinstate Monica‭  ·  last activity 4y ago by L.Dutch - Reinstate Monica‭

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Q&A Inverse orbital direction

For an in-situ born planet, it can happen, though it is hard to have the exact chain of events. Basically you need to have a series of gravitational slingshots with a larger body that put your pla...

posted 5y ago by L.Dutch - Reinstate Monica‭

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Q&A Realistic size for an atomic pure space body

Space bodies like planets, asteroids and comets are formed by the remaining materials of stars explosions. Therefore they are usually made up of several elements. There is the possibility that a p...

3 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

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Q&A Exploring a world with chiral biochemistry: chirality detection

Space explorers have landed on an Earth like planet and, to their surprise, the place is luscious and covered in life, to the point of resembling some earthly tropical atoll. What they don't know ...

2 answers  ·  posted 4y ago by L.Dutch - Reinstate Monica‭  ·  last activity 4y ago by L.Dutch - Reinstate Monica‭

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Q&A Keeping a healthy immune system on a generation-ship

An old saying goes that if you have an army, it will want to fight a war. That seems to be true also for our personal army, our immune system: there seems to be various pieces of evidence that man...

6 answers  ·  posted 5y ago by L.Dutch - Reinstate Monica‭  ·  last activity 5y ago by L.Dutch - Reinstate Monica‭

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Q&A Forming a permanent ice cap by continuous hail precipitation

Permanent ice caps are formed when the rate at which water falling under the form of snow is higher than the rate at which the water is removed from a certain region either by evaporation or outflo...

1 answer  ·  posted 5y ago by L.Dutch - Reinstate Monica‭  ·  last activity 5y ago by L.Dutch - Reinstate Monica‭

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Q&A Scientific explanation for a exceptionally bright night sky

On an alternative Earth live the people of Tcelonia. One of their founding myths goes that, in the dawn of times, when they were under the menace of being attacked by an enemy population, for an e...

6 answers  ·  posted 6y ago by L.Dutch - Reinstate Monica‭  ·  last activity 6y ago by L.Dutch - Reinstate Monica‭

Question weather astronomy
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Q&A Anatomically correct Panotti

Panotti so called from the Greek words πᾶν and οὖς for "all ears", were a mythical race of people, described as possessing large ears that covered their entire bodies. In the Natural Hi...

4 answers  ·  posted 6y ago by L.Dutch - Reinstate Monica‭  ·  last activity 6y ago by L.Dutch - Reinstate Monica‭

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Q&A Sexual pleasure in anemophile reproducing humanoids

This species of humanoids has a peculiar way of reproducing. Instead of the usual physical intercourse between a male and a female, followed by the sperm cell merging with the egg cell to generat...

5 answers  ·  posted 6y ago by L.Dutch - Reinstate Monica‭  ·  last activity 6y ago by L.Dutch - Reinstate Monica‭

Question biology sex humanoid
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Q&A Year marking astronomical event with extreme perihelion precession

For us earthlings, the concept of "year" came from the observation that the Sun reaches a minimum and a maximum span in the rise-set path in the sky. On a planet experiencing extreme perihelion p...

1 answer  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

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Q&A Sugarite: can it form?

Halite, or rock salt, is a rock formed by salt deposited in past and then undergone geological processes. My question is: provided that enough (how to get that much sugar is not in scope of this q...

4 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

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Q&A Reasonable way to determine orbital parameters in an unknows stellar system

After traveling a long long time, your spaceship is finally entering into the gravitational sphere of influence of a Sun-like star. Your captain would now like to move from the Oort-like cloud dist...

2 answers  ·  posted 8y ago by L.Dutch - Reinstate Monica‭  ·  last activity 8y ago by L.Dutch - Reinstate Monica‭

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Q&A Advantages of human view with spectral analysis capability

When it comes to processing hearing and visual signals, our brain has different capabilities. While it seems to be able to execute a spectral analysis for sounds, so that when we hear the superpos...

3 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

Question evolution senses
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Q&A Killer seeds for the sake of early plant growth

This plant I am designing grows on earth, in locations where competition between plants is fierce, water is scarce and also nutrients in the soil are diluted. The dilution requires the plant roots ...

3 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 6y ago by L.Dutch - Reinstate Monica‭

Question reality-check flora
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Q&A Human echolocation for spies. What sound to use?

There are reports of blind people being able to develop an echolocation ability, by listening to the echo of sounds emitted by them. Since this ability is pretty handy for spies and soldiers, the ...

8 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

Question espionage
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Q&A Environmental conditions on quasi tidal locked planet

There is an earth like planet, with similar mass, gravity, atmosphere and magnetic field. The main difference with earth is that it has a highly eccentric orbit (eccentricity 0.8). Let's say that ...

2 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

Question astronomy
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Q&A "Homesick" human subspecies feasibility

This human population developed in a mild climate region, with fair abundance of food, water and shelter. However, though they have the skills and the means to explore forth, the population is unab...

2 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

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Q&A Hurricane size vs planet rotation speed

Coriolis' force is the cause for winds and water streams to bend while they travel North-South along the Earth surface. This force is inversely proportional to the rotation speed of the planet: the...

1 answer  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

Question weather
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Q&A Designing a carnivorous plant

Planet Swamp. As the name suggest, it is a planet fully covered with swamps. A new kind of carnivorous plant has been discovered on this planet: when its leaves are touched by an animal or moved b...

4 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

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Q&A Would alien litterbugs accidentally create a star?

Location: an interstellar gas cloud Situation: an alien family stops for about half an Earth hour in the middle of the cloud to have a snack along their trip (by stops I mean they get null relati...

6 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

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Q&A Detecting a neutron star entering the solar system

In its wandering through the Milky Way, the solar system is getting close to a solitary neutron star. The neutron star will "fly by" above the plane of the ecliptic and its closest distance from th...

4 answers  ·  posted 7y ago by L.Dutch - Reinstate Monica‭  ·  last activity 6y ago by L.Dutch - Reinstate Monica‭

Question astronomy
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Q&A Low or absent pathogenicity viral agent

Pathogen virus work in a simple way: they inoculate their genes (DNA or RNA) in the host cells and let them replicate huge amounts of the attacker while hampering the host vital functions. As react...

4 answers  ·  posted 8y ago by L.Dutch - Reinstate Monica‭  ·  last activity 7y ago by L.Dutch - Reinstate Monica‭

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Q&A Switching between poikilothermic and homeothermic metabolism

I am designing a mammal living in a warm environment (like a warm desert) which has developed a switchable metabolism, so that during the day it is cold blooded and during the night (when it is col...

3 answers  ·  posted 8y ago by L.Dutch - Reinstate Monica‭  ·  last activity 5y ago by L.Dutch - Reinstate Monica‭