What would be the smallest plausible density of a potentially habitable rocky planet? Mean density of Earth is 5514 kg/m 3 . Density of aluminium, which is quite a common element, is 2700 kg/m 3 . I often come across Earth-sized or larger desert worlds less dense than that. What elements or ...

Given the nature of comet tails or coma, is it possible to observe rainbow or similar phenomena on a comet?

RSC 8474-5122-4-3588-1740 4 has got a double volcano.

Puffy planet
http://i1287.photobucket.com/albums/a632/0Arnost/scr00166_zpsjsu1kbhb.jpg [/size]

Speaking of small red dwarf stars, past M8.0 V, they get a lot smaller than Saturn, at M9.3 V, smaller than Uranus.
I found one twice the size of Earth. Why does SE make them this small? Is it realistic ...

Venus must have a slow rotation to enable temperate climate, according to some modern study.
I have stumbled across this on wikipedia.

More recent research has however shown that the current slow rotation rate of Venus is not detrimental to the planet's capability to support an Earth-like ...

My parameters are these.

http://i1287.photobucket.com/albums/a632/0Arnost/scr00158_zpsyeb88wbb.jpg
These are for all sorts of planets about which I think may be tarraformable. There are plenty of such. The lower mass limit of 0.05 is just under the mass of Mercury, which has nearly the same ...

I have terraformed the terrestrial bodies of the Solar system too. (All but Mercury)

http://i1287.photobucket.com/albums/a632/0Arnost/scr00150_zpsa3any2nv.jpg
http://i1287.photobucket.com/albums/a632/0Arnost/scr00151_zpscogd9ups.jpg
Venus - It has a little bit thinner atmosphere than Earth. I ...

I've been playing around with Earth a lot lately.

At first I have put Earth onto different orbits around different types of stars. I have only specified radii, masses, bump map, bump height, atmosphere, semi-major axes and eccentricity - 0 in almost all cases. Then I added life to see what colour ...

The most insane thing I've ever seen is a ridiculously volcanic moon. I mean seriously, that thing illuminated the moons nearby as if it were the reflection of the planet.
Once I created a star and it generated a bunch of procedural planets. One moon was 2.11 magnitudes brighter than it's cold gas ...

Eclipses? Very well...

http://i1287.photobucket.com/albums/a632/0Arnost/Mars%20by%20Phobos_zps1mwneyme.jpg
Phobos casts shadow on Mars. (Dark spot near Noctis Labyrinthus)

http://i1287.photobucket.com/albums/a632/0Arnost/Neptune%20by%20Triton_zpsqv32vzdc.jpg
Triton eclipses Neptune

http ...

Take a look at this thing. I've been looking for terra moons of gas planets in the Triangulum galaxy and stumbled across this one.

http://i1287.photobucket.com/albums/a632/0Arnost/scr00133_zpslxa1n5zl.jpg

At the first glance it may look like the gas giant and it's moon system is rolling on the ...

Nebulae in the Andromeda galaxy

http://i1287.photobucket.com/albums/a632/0Arnost/scr00117_zpswylxnces.jpg
http://i1287.photobucket.com/albums/a632/0Arnost/scr00119_zpsyzq9r3ge.jpg
http://i1287.photobucket.com/albums/a632/0Arnost/scr00120_zps5jenojnz.jpg
http://i1287.photobucket.com/albums ...

An'shur ,
maybe your comet script contains too many objects.
The same problem I have when I use asteroid belts with too many objects.
I guess the number of possible nonprocedural objects is limited by the available memory.
SE generates up to 1000 asteroids and often around 150 comets in one system ...

Hello, I have a major problem.

Besides that, I also have few fairly minor issues I can live with. For example: Planets are sometimes glitchy in editor mode, but it's good in planetarium. SE crashes when I fly like crazy in globular clusters, nebulae or galactic cores. My computer does not like ...

Smallest red dwarf I have found so far. Look at the size of that thing...

http://i1287.photobucket.com/albums/a632/0Arnost/scr00075_zpsecogqacf.jpg
It also has a planetary system. Some of these planets are big enough to cause total solar eclipses on the outer worlds.

Edit: I went searching even ...