Category: Physics


Orbital Dynamics Part 01 First Discoveries

Welcome to orbital dynamics. This is a multi-part course on the basics of orbital dynamics. The orbital dynamicsor orbital mechanics textbooks assumefamiliarity with calculus and all thealgebra and trig that goes along with that....


Orbital Mechanics in 60 Seconds – I

So, contrary to what you see in moviesspacecraft can’t just sit around inspace near a planet because they’d fallright into it. To stay in space we needto get into orbit. So first we take...


Crazy Engineering: Astrodynamics

The Cassini Mission has beenexploring the Saturn systemfor nearly 13 years and hasrewritten the textbookson the ringed planetand its moonsbut the spacecraft ispretty much out of fuel. Following NASA’s planetaryprotection guidelines,the mission willend with...


Scientists Discovered Gravitational Waves

Scientists from the Laser Interferometer Gravitational Wave Observatory (LIGO) have announced that they made a first direct detection of gravitational waves. The discovery confirms that Einstein was right. Namely, he predicted the presence of...


Fundamental Symmetry

Scientists from the University of Sao Paulo (USP) and the University of Campinas have made precise measurements of particle mass and electric charge that confirm the existence of a fundamental symmetry in nature.


Scientists Constructed Magnetic Wormhole

Scientists at the Universitat Autonoma de Barcelona have created a magnetostatic wormhole that connects two magnetic fields. This year, they make a tunnel between them invisible. Even though this wormhole is not time-space wormhole...