Search
1 - Is this system viable ? I think the buck stops here, really. No, it's not viable. What you are proposing is perhaps "possible" in some limited sense (but as already pointed out by others,...
First off, plus/minus a few billion kilometers in any direction actually isn't that terrible, particularly if you have FTL and/or are already dealing with interstellar distances. For comparison, th...
Triangulation does not require being able to determine distance. Here is an example on an earth-bound maritime navigational chart: The ship in this situation would need to know in advance that ...
There are several possibilities - actually, quite a few - for the development of life in the Degenerate Era. Some have potential; some don't. The planet is a rogue planet. It has been proposed th...
No, they will not be able to reach space. At least if we assume that our understanding of physics is correct. Since you do not state anything to the contrary, that's an assumption I am willing to m...
As the others have said, without anti-gravity it won't work, with anti-gravity you can pretty much do whatever you want. Just a few things to think about With a diameter of 1 light year ($5.879 ...
Use a geoid. A geoid is, to quote Wikipedia the shape that the surface of the oceans would take under the influence of Earth's gravitation and rotation alone, in the absence of other influence...
Doing a simple density calculation, I get $$\rho=\frac{0.09M_{\oplus}}{\frac{4}{3}\pi R^3}\approx15.97\text{ grams/cm}^3$$ For comparison, here's a list of the average densities, $\bar{\rho}$, of t...
The lasers will need energy. A lot of energy. Possibly several terawatts of energy each. So you'll need to put them somewhere they can get energy. So put them in orbit around one of the gas giants,...
Have you considered a Sitnikov planet? Image courtesy of Scholarpedia user Christoph Lhotka under the Creative Commons Attribution-ShareAlike 3.0 License. A Sitnikov planet moves on an axis, pe...
One thing we have to take into account is that you can only accelerate for the first half of the trip. You then have to decelerate for the second half; otherwise, you won't be able to stop unless y...
For the TL;DR, see the bottom of the answer. See also What would it take to get a message to another star? on Space Exploration SE. We can approach answering this by considering how sensitive ou...
I have two main points. Compressibility. Your idea of his body forming an indentation rests on the assumption that the Earth's core is incompressible. This is not true. While it is thought to be ...
I think you'd need to add a condition - something like once under the surface, remote drones or fast vehicles can't be used (insert reason of your choice) because otherwise you could very rapidly e...
As anyone who's studied inorganic chemistry knows, many salts of copper in the +2 oxidization state have colors ranging from green to a nearly black dark blue, including some remarkably intense sha...
If the planet was pretty close to the star that could do it, such that ships outside of the umbra/penumbra would be hit by the full force of the solar radiation and thermal energy. That is kind of...
Research suggests that heavier elements can be found in greater quantities closer to the center of a spiral or elliptical galaxy. Henry & Worthy (1999) summarized several measurements of ratios...
You would have to have another form of input in order to look sideways across time. Our eyes see what is around us in this space and time. You'd have to have a time2D vision organ to allow you to s...
Everyone will burn to death. This NASA page shows temperature changes during the collision between Earth and Theia in the Giant Impact Hypothesis. The temperature is on the x-axis, in Kelvin: Y...
This question has already been debated by exo-astronomers. The best answer they could come up with (using 1974 technology) was the Arecibo Message. The details might change, but the essential ide...
Work towards the heat death of the universe. Your idea sounds a lot like the heat death of the universe, a hypothetical event where the universe reaches maximum entropy and no more work can be don...
I wrote a blog post about this for Worldbuilding Stack Exchange's blog, Universe Factory, so I'll work off of that. First, the good stuff: a picture of what you're looking for. It's from Alexey Bo...
Neutron stars, while small, have a lot of mass. A neutron star with a diameter of 22 kilometers could have twice the mass of the sun, so large orbits are possible. Actually, because of the threa...
So you know how sometimes songs get stuck in your head for hours, even if you've only heard a small snippet? That's because some music creates patterns that resonance with our minds, and once st...
This is a tough question to answer because any planetary system with more than one planet is tough to analyze. When two planetary systems collide, the result is overwhelmingly difficult to analyze,...
