Planetary Directory In Astronomy & Space Science

Calculate the energy and crater size of a hypothetical asteroid impact from mass and velocity.

Calculate the dates and visibility of upcoming solar and lunar eclipses for your location.

Calculate the current moon phase and upcoming full and new moon dates.

Calculate your weight on any planet in the solar system based on surface gravity.

Calculate delta-v from the Tsiolkovsky rocket equation using mass ratio and exhaust velocity.

Calculate scaled distances and sizes for a solar system scale model at any chosen scale.

Estimate space mission costs from payload mass, orbit, and launch vehicle selection.

Calculate breathable air supply duration for EVA from tank pressure, volume, and consumption rate.

Calculate the distance to a star from its parallax angle in parsecs and light years.

Calculate sunrise, sunset, and daylight hours for any location and date on Earth.