From Kepler to Bessel
The previous post very briefly said that the integral representation for Bessel functions was motived by solving Kepler’s equation. This post will go into more detail. Kepler’s equ...
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The previous post very briefly said that the integral representation for Bessel functions was motived by solving Kepler’s equation. This post will go into more detail. Kepler’s equ...
The Earth may not be that massive, but it still distorts space-time.
Мы привыкли, что задача трех тел — это символ хаоса, проклятие небесной механики, над которой Пуанкаре махнул рукой в 1890-м. Ньютон не решил, Лагранж только частные случаи нашел,...
A new episode has been added to the database: Orbital (Pt. 2 of 2)
Giant mirrors in space have been a staple of science fiction for decades. But so far there’s been very little work looking at the actual physics behind the concept - possibly becau...
An earlier post discussed how to solve Kepler’s equation M =В E в€’В e sin(E) using a sine series. You could also solve Kepler’s equation using a power series, which Lagrange did i...
Giant mirrors in space have been a staple of science fiction for decades. But so far, there's been very little work looking at the actual physics behind the concept—possibly becaus...
Ever wonder why rockets don't shoot straight up into space? Discover the fascinating physics behind curved rocket launch trajectories and gravity turns.
Kepler solved his eponymous equation M =В E в€’В e sin(E) by finding a fixed point of E = M + e sin(E). So guess a value ofВ E and stick it into the right hand side. Then plug that...
Asteroid mining seems simple in theory. A spacecraft flies up to a giant rock in space, scoops out some material, and either processes it on site or returns it back to a huge centr...
Asteroid mining seems simple in theory. A spacecraft flies up to a giant rock in space, scoops out some material, and either processes it on site or returns it back to a huge centr...
Plotting the optimal trajectory to visit multiple asteroids is a fiendishly difficult take on the Traveling Salesperson problem, but a new mathematical approach has succeeded in so...
The Traveling Salesman is a classic problem in mathematics that requires a solution to the most efficient path to take to visit a given number of cities in the least amount of time...
The Space Docking Problem Roadshow: Season 1, Episode 4 Megan Wallin-Kerth Thu, 05/21/2026 - 12:03 Large Image Caption...
The spacecraft rendezvoused in orbit for a simulated orbital threat scenario.
Less than 17 hours after receiving orders, Rocket Lab put Pioneer in orbit for close-range maneuvers with True Anomaly's Jackal satellite
Scientists have found a cheaper way to send spacecraft to the Moon by using a gravitational sweet spot as a pit stop, cutting fuel costs by at least 58.80 m/s compared to existing...
It's getting crowded up there. Over the past few years, the advent of SpaceX's Starlink and other players in the mega-satellite constellation game are adding an exponential load of...
MIT engineers are testing a new propulsion system that combines the power and speed of conventional chemical thrusters with the precision and fuel-efficiency of electrical thruster...
The European-Chinese Smile mission reached its designated science orbit on June 20, 2026. The team is now embarking on a two-month campaign to commission the spacecraft, which invo...
by bsoplinger Orbital is an expensive "boardgame" that requires an app to play.
ISJ hears exclusively from Kumar Sokka, CEO of Acre Security about the resilience issues associated with orbital compute. Are space data centres realistic given the risks and diffi...
Imagine a piece of space debris the size of a hockey puck slams into a Starlink satellite at about 10 kilometers per second. The kinetic energy is equivalent to 2 kilograms of TNT,...
NASA’s never-before-attempted plan to move a sensitive scientific satellite into a safer orbit has faced a week of delays—but it’s still go for launch.
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