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How to prevent ice caps from forming on cold planets?

If the world is cold enough that there can be snow and ice build up, and thus glaciation, at all, or almost all, latitudes, which is possible, it's happened before on Earth and which you seem to have ...
Ash's user avatar
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1 vote

What's a semi-plausible 24 hour planetary sterilization look like?

Destroy the ozone layer or local equivalent thereof. Or the other way around: boost ozone production in the lower atmospheric layers. On Earth, stratospheric ozone acts like superefficient sun cream: ...
François Jurain's user avatar
2 votes
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How would a monster be part of a planet's core?

In his house at R'lyeh dead Cthulhu waits dreaming Who says the Monster has to be one of Flesh and Blood that conforms to the physical laws of this universe? The notion of Ancient, timeless entities ...
TheDemonLord's user avatar
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What's a semi-plausible 24 hour planetary sterilization look like?

Coronal Mass Ejection - On Steroids I propose to you, have some device that triggers the primary star for the solar system to send out 10% of it's mass in a single ginormous solar flare. IE a ...
kiltannen's user avatar
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2 votes

What's a semi-plausible 24 hour planetary sterilization look like?

EXTERMINATUS! Destroy the planet outright. Use the power of a gas giant harnessed through an electronic lens, focusing on the surface, to blast a molten channel through the surface and incinerate ...
Trish's user avatar
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3 votes

What's a semi-plausible 24 hour planetary sterilization look like?

Blasting them with electrons Considering the fact that you have a Star Wars-style civilisation, doing this is a cakewalk. Simply hook up a few Dyson Sphere to your ELECTRONLASER 4000 (Basically just a ...
Alastor's user avatar
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3 votes

What's a semi-plausible 24 hour planetary sterilization look like?

Giant space mirrors. Napkin math says that the oceans would boil away if we 4x the energy input, it wouldn't take a lot of resources to make space mirror and they would likely already be in use for ...
Shreking Shracc's user avatar
1 vote

Stealth In Space Calculator

Rd = ( 17.8E6 * sqrt( MsAsIsp(1-Nd)(1-Ns) ) ) I hate creating what is basically a copy paste answer but the link is buggy and the relevent part is buried, but it covers everything. So I included all ...
John's user avatar
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3 votes

Stealth In Space Calculator

This is a Frame Challenge A quick note: a question I asked on Astronomy, which wasn't well received, does make a few good points that are brought up here. You're detecting light in the infrared ...
JBH's user avatar
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15 votes

Stealth In Space Calculator

1. SNR to exposure time Although your mileage may vary depending on the details of your detector, you can take an approach similar to deriving what is known as the CCD equation. It's derived for the ...
HDE 226868's user avatar
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1 vote

Stealth In Space Calculator

Let us start with the measurements of the cosmic background as measured by the ESA Planck spacecraft. This mapped variations in the cosmic background. The CMB has a thermal black body spectrum at a ...
Richard Kirk's user avatar
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3 votes

Stealth In Space Calculator

NETD vs Pixels I think I worked it out. Thermal sensors basically work like cameras; so, to figure out how much I can see in 360 degrees, I first need to figure out how many pixels it would take to ...
Nosajimiki's user avatar
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16 votes

Stealth In Space Calculator

What you need to compute is how many photons hit the entrance pupil of the camera in the allowable exposure time. This is one place where the field of view of the camera comes into play. The entire ...
AlexP's user avatar
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0 votes

What information should be displayed on realistic & intuitive tactical sensor screens for space warfare?

Star Trek-esque viewscreens replicating a "Front window" would entirely be inconsequential to space warfare because vessel's perception based on crew capability to discern objects. Naval ...
LazyReader's user avatar
6 votes

Is it viable to broadcast a signal and be detected within starsystem distance?

Yes First, you can arrange the frequency range to be used solely by distress signals, and arrange a set of omnidirectional listeners to detect the signal in that frequency range, to minimize unwanted ...
Vesper's user avatar
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1 vote

Is it viable to broadcast a signal and be detected within starsystem distance?

Of course it's viable. The problem is reception Check out this wonderful image showing the approximate distance human RF transmissions have traveled in the Milky Way. Please click on this image to see ...
JBH's user avatar
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1 vote

Is it viable to broadcast a signal and be detected within starsystem distance?

Communication with Voyager continues even though it's left our system so it's definitely practical to communicate complex information over such distances with acceptable loss. Voyager continues to ...
talrnu's user avatar
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