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Questions tagged [hard-science]

Requires answers backed up by equations, empirical evidence, scientific papers, other citations, etc. Contrast with: science-based and reality-check tags. This tag should never be the only tag on a question because this tag frames how a question should be answered, not the topic. Review the tag info before using this tag, and flag your question for moderator attention once posted to have the hard-science notice added.

7
votes
6answers
522 views

What more than sentience do you need from a species for its intelligence to be recognizable by humans?

It's becoming obvious from how could humans recognize another species as sentient / intelligent that recognizing another species' intelligence is very complicated. There are no universal tests, no ...
30
votes
24answers
4k views

Close Quarters Combat… In Space

A simple enough question, but one that Grimmsdottir and I agonized over. Basically, what would enable close-ranged fighting between space fleets/ships? We both agreed that having gargantuan ships ...
14
votes
10answers
2k views

How does the Ash Manor get electricity?

Previously on the same setting (: How close is too close for a human habitation to be near an erupting volcano? What factors could delay the rescue of a small group of survivors on a Pacific volcanic ...
29
votes
19answers
5k views

Design a non-computerized biometric door

Nowdays we have biometric doors that can scan your eye, palm, fingerprint, ear, etc, etc... But all of them rely on electronic readers and computers to match the sample against the stored pattern. ...
4
votes
3answers
364 views

Racing Around the Edge of a Black Hole

I am trying to understand the physics of an interstellar race. Say two ships are racing past a black hole as if it were a corner on a race track. One of the ships takes a hard line and comes very ...
11
votes
4answers
426 views

What kind of environment would lead to dominantly yellow foliage?

I'm looking for various factors; Atmosphere Composition, Type of Sun, etc, whatever would work. That is, of course, if this is even likely/possible. I believe that yellow is generally not an ideal ...
20
votes
10answers
2k views

How large can a volcano be?

A key part of the plot in a story I'm working on revolves around the main region being on top of volcano that is set to erupt. The trouble is that the region in question in my setting is roughly the ...
19
votes
5answers
4k views

Can free-space holograms exist?

Holograms are a real thing. But what science-fiction TV shows and movies call holograms are something different entirely. From a classical geometric optics standpoint, in order to create the ...
4
votes
1answer
171 views

Life in a planemo

I need to create a race that should be utterly older than humanity (and as such, much more powerfull). My idea is to have that race originate from a rock planemo - a rogue planet, orbiting the center ...
9
votes
2answers
277 views

Cosmic Background Radiation in the past

I have a story where a species of the very first (literally first) carbon-based humanoid life (surprise!) that happen to emerge roughly seven billion years ago (their home system were formed twelve ...
5
votes
1answer
231 views

Asteroid flux or: How to make a planet perfect for mining

One of the cool things about the Moon is that the far side has a thicker crust that the near side.1 One theory explaining this is that the Moon was hit by an object, possibly a moonlet created by the ...
20
votes
4answers
11k views

Could a Tank Survive a Nuclear Blast?

In the red corner, a top of the line Main Battle Tank, you can have your pick, but let's say a tricked out M-1A2 'Abrams' with a full Nuclear-Bio-Chem Protection kit. In the blue corner, a Nuclear ...
13
votes
2answers
773 views

How can a Type II civilization influence accretion rates from a debris disk to a passing star?

This is supposed to be a test of the hard-science tag. All answers to this question should be backed up by equations, empirical evidence, scientific papers, other citations, etc. Speculative or ...
20
votes
3answers
2k views

Making a planet habitable for humanoids: The planet

The question: What characteristics are necessary for a planet to be habitable for humans? What should the generic star and planet be like? The life forms are human, so they Need to have access to ...
18
votes
1answer
1k views

Making a planet habitable for humanoids: The star

The question: What characteristics are necessary for a planet to be habitable for humans? What should the generic star and planet be like? The life forms are human, so they Need to have access to ...
13
votes
5answers
2k views

How to get across the galaxy moving slower than light - in a single lifetime?

All the recent talk on Worldbuilding about the vast energies available to higher-level Kardashev civilizations, the need for 50,000 year message-systems, and so on, got me thinking. With enough energy,...
26
votes
10answers
3k views

How could humans recognize another species as sentient / intelligent?

There is this fantasy in fiction that humans meet another species and figure out that it's intelligent. This usually happens with dragons, dolphins, aliens, collectively intelligent plancton... But ...