🛰️ Solar System & LEO Command
The Heliocentric Model and Orbital Projections
Explain that the map uses a heliocentric coordinate system, mapping planetary positions relative to the Sun. Mention that since planets have varying orbital periods (Kepler’s Third Law), their relative distances change constantly.
Distances and the Astronomical Unit (AU)
Define the AU as the average distance between Earth and the Sun (~149.6 million km). Explain why this unit is used instead of kilometers—to simplify the immense scale of the solar system, where Neptune sits at roughly 30 AU.
Conjunctions and Planetary Alignment
Explain what a planetary conjunction is (when two planets appear close in the sky or have the same ecliptic longitude). This adds immediate value for the user planning observations.
Orbital Inclination and the Ecliptic Plane
Briefly note that while the map is a 2D projection, the planets actually orbit at slight inclinations to the ecliptic plane, which is why they don’t always collide or block each other’s paths despite their complex crossings.
| Planet | Distance (AU) | Orbital Period |
|---|---|---|
| Mercury | 0.39 | 88 Days |
| Venus | 0.72 | 225 Days |
| Earth | 1.00 | 365 Days |
| Mars | 1.52 | 687 Days |
| Jupiter | 5.20 | 11.9 Years |
| Saturn | 9.58 | 29.5 Years |
| Uranus | 19.22 | 84 Years |
| Neptune | 30.05 | 165 Years |
Solar System FAQ
There are eight officially recognized planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. While Pluto was reclassified as a “dwarf planet” in 2006, it remains one of the most searched objects in our solar system alongside other dwarf planets like Eris and Ceres.
Jupiter is the undisputed king of the planets. It is so massive that all the other planets in the solar system could fit inside it twice over. Its “Great Red Spot” is actually a giant storm that has been raging for hundreds of years.
It’s all about the atmosphere. Mercury has almost no atmosphere to trap heat. Venus has a thick, toxic atmosphere of carbon dioxide that creates a runaway greenhouse effect, trapping heat and making its surface hot enough to melt lead.
The Asteroid Belt is a vast region of rocky debris located between the orbits of Mars and Jupiter. It contains millions of asteroids, ranging from tiny pebbles to the dwarf planet Ceres, which is about 950 km in diameter.
According to the IAU, a planet must orbit the Sun, be spherical, and have “cleared the neighborhood” around its orbit. Dwarf planets, like Pluto or Eris, meet the first two criteria but share their orbital path with other debris and objects.
The four inner planets (Mercury, Venus, Earth, Mars) are terrestrial, meaning they have solid, rocky surfaces. The four outer planets (Jupiter, Saturn, Uranus, Neptune) are gas and ice giants, composed mostly of hydrogen, helium, and water/ammonia ice, with no solid surface to stand on.
Beyond Neptune lies the Kuiper Belt, a freezing realm of icy objects and dwarf planets. Even further out is the theoretical Oort Cloud, a giant spherical shell surrounding the entire solar system that is believed to be the source of long-period comets.