# Tag Info

### Plausible orbit to have a visible object slowly circle over the night sky

A binary star system around the planet's north pole There's a serious issue with the question: You want the observer to use solar clock to determine "every night", but the star-based time ...
• 8,602
1 vote

### Plausible orbit to have a visible object slowly circle over the night sky

This depiction of 20 stable 3 body problem solutions may provide an orbital set that suits. Viewing highly recommended to all. There are others. If one body other than your target world was luminous (...
• 1,518

### Plausible orbit to have a visible object slowly circle over the night sky

There are one relatively straight-forward answer and one where it would not be the night sky but the Sun itself A (distant) giant planet with 200 years orbit Any planet around the central star with a ...
1 vote

### Could you please check my calculation for a habitable binary planet system?

According to this handy calculator the Goldilocks Zone of this system is from 0.7 to 1.0 AU, your worlds orbit right at the inner edge of this, they're going to be fairly warm with an Earthlike ...
• 49.3k
1 vote

### Plausible orbit to have a visible object slowly circle over the night sky

Sirius, as seen from either WISE 0855-0714 or Procyon, would probably fit the bill. Sirius is the single brightest star in Earth's sky, Procyon and WISE 0855-0714 are only a little over half the ...
• 49.3k
1 vote

### Plausible orbit to have a visible object slowly circle over the night sky

You can use Lagrange Points and a comet. Now, L2, which is the only point on the night side is unstable. This means that a comet caught there will eventually escape. L4 and L5 are stable, however, ...
1 vote

### Plausible orbit to have a visible object slowly circle over the night sky

The world is orbiting one of a binary pair of stars, with a 200 year period. There is a third star toward the axis of the binary (toward the north or south poles of the binary system), either a very ...