Hvatvetna

The solar system in which our story takes place, considered to be the physical manifestation of the Goddess Dagstjarna (The Daystar) and her daughters.

Geography

Physically, Hvatvetna is a solar system with a large, K-type sun and eight planets.

Celestial	Physical characteristics	Notes	Orbit Radius*	Orbital period
Dagstjarna	Solar primary	Large K-type star, orange more than yellow.	0	0
Leysastjarna	Drekivard - Small inhospitable planet.	Once living, tidally locked rotation, no water, only trace atmosphere. Original home of draconic races.	0.3 AU	60 days
Meginstjarna	Brunivard - Hot medium planet, shallow seas, many deserts.	Rich with fire elementals, fire giants, and others who like the heat.	0.5 AU	129 days
Blodstjarna	Spekivard - Small, rocky, with no deep oceans. Lakes will be fresh, salty, or saturated with who knows what from the minerals nearby. Hydrological cycle is rapid, with lots of cloud cover. Life is prolific at the lichen and fungus level.	On the warm side of temperate. Axial tilt makes strange seasonal cycle, hard to grow things beyond lichen and fungus.	0.67 AU	201 days
Glitastjarna	Liggjavard - Earthlike world	Earthlike with rich variety of biomes, humanoid, and non-humanoid races.	0.87 AU	300 days
Hridstjarna	Styrmavard - Small water world, few jagged peaks above the waves and ice. Heated by radioactive decay from deep within.	Highly variable orbit, tilted from the plane of the ecliptic. Drastic seasonal variations.	0.45 - 1.5 AU	351 days
Sudrstjarna	Skadivard - Small water world with four seasons, on the outer edge of the habitable zone.	Lightly inhabited, darkest and coolest of the five worlds	1.25 AU	510 days
Urdrstjarna	Lykkjavard - Large outer planet with methane atmosphere	Jupiter style, swirly colors and bizzarro storms	1.6 AU	738 days
Tidstjarna	Vakavard - Large outer planet with methane atmosphere	Neptune style	1.9 AU	956 days

Laws of Planetary Motion

1. Orbits are not circles, but ellipses with the primary at one focus. The other focus could be close (a mostly circular orbit) or could be further out (an obviously elliptical orbit.)
2. The time a body spends covering part of its orbit is a function of how far away it is from the primary, and can be calculated by looking at the area of the ellipse swept by a line from the primary to the body. "Equal area in equal time." (Means you move faster in orbit closer to the sun.)
3. P² = a³, where P is the period of the orbit in years and a is the semi-major axis of the ellipse (essentially the radius, for mostly round orbits). Take the distance from the sun, cube it, take the square root of that, multiply by number of days in an Earth year, and you get the orbital period in Earth days.

— Johannes Kepler

DRAFT

This article is currently a work in progress and is only here so that people looking at the other articles can see where I'm going. Guaranteed to be incomplete or subject to change.

Type

Solar System

Included Locations

• Brunivard
• Drekivard
• Liggjavard
• Lykkjavard
• Skadivard
• Styrmavard
• Vakavard