Questions tagged [macroengineering]

The implementation of extremely large-scale design projects, often in planetary size of more.

Filter by
Sorted by
Tagged with
36
votes
17answers
8k views

What can plausibly explain many of my very long and low-tech bridges?

I have a very large developed (relatively rational) fantasy game world which mostly has medieval technology with some Renaissance technology, and some low-powered magic. In it, when I was much ...
27
votes
5answers
8k views

Building a road to escape Earth's gravity by making a pyramid on Antartica

If you have miles of steel pipes 10m thick, could you pump water from the sea to the centre of Antarctica, then pump it into the air like a geyser so that it falls around the pipe. As the fallen ...
12
votes
8answers
3k views

Trap light in a cage [closed]

Is it possible to build a mirror cage in order to catch light in it? Let's assume the surface of the mirror reflects absolutely 100% of the light. Which shape of cage is the best to do this? Is it ...
12
votes
4answers
2k views

Would decreasing the diameter of an orbital ring create artificial gravity?

My habitat ring is constructed in orbit around a planet with disconnected sections: (not to scale, obviously) The sections are connected by cables and winched together. As the diameter gets smaller, ...
12
votes
5answers
997 views

How could you dig a hole through the fluid mantle of a planet?

The Question of the Tunnel through a Planet grinds my mind. How could you dig a Hole through the fluid mantle of a planet? Would your walls not constantly break and collapse on you after the 15-20 ...
11
votes
5answers
2k views

If you had a giant cutting disc 60 miles diameter and rotated it 1000 rps, would the edge be traveling faster than light? [closed]

As if there was a giant angle-grinder in space that slowly increased its speed. The question assumes that material exists to make this super-disk that doesn't rip apart. What happens as the edges ...
10
votes
6answers
2k views

What would happen to a man-made orbital ring/belt, if a portion of it was destroyed?

I'm working with the idea of a 'ring station' encircling a planet, as a tightly connected belt of structures that connect in orbit around the planet's equator. I'm curious to know what would happen if ...
10
votes
2answers
270 views

Dozens of Habitable Worlds in One System?

I want to know if this is physically possible. So at first I thought I was nuts. Then I started reading about Hill Radii, and googled left and right. Turns out a Hill Sphere is the region around an ...
9
votes
2answers
374 views

Stellar Compression in Dyson Sphere

A Dyson sphere is a spherical megastructure built around a star with the goal of capturing all of the energy output of the encased star and making that energy available to the controllers of the ...
6
votes
1answer
131 views

Balancing Water Vapor and Temperature for Global Cloud Layer

BACKGROUND: I have been working on a game called Rise: The Vieneo Province. Vieneo is a terrestrial moon (all details can be found here) but we have an atmospheric composition we arrived on from ...
6
votes
2answers
244 views

Stellaser Part I: Trial by stellar Fire or The best design out of three for a solar powered 5 Petawatt laser?

I´m building a hard-sifi setting and want to use Stellasers (abbreviation for stellar laser) to provide thrust and power to interstellar vessels. This part one is only concerned with the construction ...
5
votes
3answers
317 views

Would total reliance on Solar and Wind energy sources lead to climate change?

If Humanity were to suddenly come to its senses and stop relying all together on fossil fuels and start relying on wind powered and solar energy sources, wouldn't this lead to some sort of climate ...
5
votes
1answer
130 views

How would Mars' orbit be affected if it had double its mass?

I have one idea for a planet which may turn out to be a massively reengineered and terraformed Mars, which would have double its mass to be more Earth-like, an installed magnetosphere, etc. It would ...
5
votes
2answers
119 views

Orbital configuration for a stellar beacon

Some research papers, such as Arnold 2005, has investigated the possibility of using artificial megastructures transit signatures as long-range, long-lived and low-maintenance signals of unambiguously ...
4
votes
5answers
404 views

Will be possible in the far future to use megascale engineering to create a ringworld around Earth?

I mean in the far future megascale be advanced enough to allow the construction of a ring world around Earth or around a low mass star( a red dwarf for exemple). If yes, how big Earth would look from ...
4
votes
2answers
296 views

Artificial water planet and shell world combo

I’ve been trying to create a water planet with certain aspects. I wanted it to have a breathable atmosphere and to be a microgravity environment. I’m developing humanoid characters that can breathe ...
4
votes
3answers
394 views

Making a Rainforest

Say you have a region that is not a rainforest, but you want it to be. What would you need to do to engineer a rainforest? My current best guess for what all you'd need is: relatively constant ...
3
votes
9answers
344 views

Force Field Contains a Star

How would you contain a small star in order to draw energy from it, and power a ship? I'm thinking along the lines of a force field. I need the star visible from the exterior of the ship for ...
3
votes
1answer
81 views

Is “programmable biosphere” a good synonym for “terraforming”? [closed]

Is "programmable biosphere" a good (albeit more technical) way to describe terraforming, or does the phrase imply something different? If something different, what would the difference be?
3
votes
1answer
127 views

Reality check: multi-shell worlds and rotation

In the game Septerra Core, it is set on a shell world of 7 different world shells including a core. As per my Matryoshka world that I am building (this world but with full surface coverage on each ...
2
votes
4answers
230 views

Crete-sized floating island plausibility

Biggest icebergs have areas roughly similar to Crete and 500 meters thick, (https://en.wikipedia.org/wiki/Iceberg_B-15) I assume most of that thickness is hidden underwater, sadly I could not find ...
2
votes
3answers
386 views

White Dwarf mining?

This is a follow-up to Neutron Star mining. Assuming that problem can be solved, it would eventually degenerate to something similar to this case. And if it can't, white dwarfs seem like the next best ...
1
vote
5answers
186 views

Excavating Doggerland by floating a giant concrete bottomless box/boat, dropping it to the floor and draining. What are the main challenges? [closed]

The sea level was once 100m+ lower, rising to todays levels between 18000 and 5500BC. Recent evidence suggests the area in the North Sea, once landmass we now call Doggerland, was densely populated, ...
1
vote
1answer
172 views

Creating a Matryoshka Shell World: Sectioning

In my previous two questions regarding temperature regulation and Rotations I set up the idea of creating a multi-layered shell world consisting of planetary crusts stuffed inside one another creating ...
1
vote
1answer
214 views

Igniting Jupiter [duplicate]

One of the defining moments in the book and film 2001 A Space Oddesey is when Jupiter is converted into a star, thus bringing its various moons into play as habitable worlds. Arthur C Clarke was a ...
1
vote
3answers
271 views

How would we engineer humans for space? [closed]

It's the year 2XXX. Humanity is on the verge of another dark age and our best minds look to the stars for escape. Unfortunately, a few centuries of expeditions have yielded some painful lessons on ...
-3
votes
1answer
99 views

Could the city of Boston, Mass avoid rising sea levels by building levees? [closed]

I have seen similar proposals to deal with potential sea level rises in New York City, which would work by constructing levees around the east river and the barrier islands surrounding Staten and Long ...