NilsMoll

NilsMoll is an advanced yet easy-to-use astronomy and physics calculator app designed for students, researchers, and curious space enthusiasts. The app combines six powerful calculators that help you explore the fascinating mechanics of our universe — from rocket thrust to gravitational force and the mysteries of light travel. Every calculator is crafted with precision, featuring a clean interface, instant results, and detailed explanations for better understanding.

Rocket Thrust Calculator
Calculate the thrust generated by a rocket engine using exhaust velocity and mass flow rate. This tool helps aerospace learners and hobbyists analyze propulsion efficiency, understand momentum principles, and estimate engine performance for any given mission.

Escape Velocity Calculator
Discover the speed required for an object to break free from a planet’s gravitational pull. Enter the planet’s mass and radius to find the escape velocity instantly — perfect for studying planetary science and understanding space mission requirements.

Orbital Period Calculator
Learn how long it takes for a satellite or celestial body to complete one full orbit around another. This calculator uses orbital radius and gravitational constants to simulate realistic orbital mechanics and timing.

Gravitational Force Calculator
Compute the attractive force between two masses based on Newton’s Law of Universal Gravitation. Ideal for physics students, this calculator provides both the numeric result and an explanation of how mass and distance affect gravitational strength.

Astronomy Date Calculator
Convert astronomical timeframes, predict celestial events, or estimate the number of days, months, and years between two significant dates. Great for planning observations, eclipses, or tracking long-term cosmic events.

Light Travel Time Calculator
Understand how long light takes to travel across space. Enter the distance in kilometers to see the equivalent time and convert it into light-years, giving you a real sense of how vast our universe truly is.

With NilsMoll, science becomes interactive, educational, and visually clear — turning complex space calculations into simple, beautiful insights.