Archive for orbit

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The Space Elevator Concept

Design Your Own Space Elevator – [] The Universe Documentary – Space Elevator and Carbon Nanotubes – [] The Space Elevator – no longer Science Fiction – [] An Elevator to Space: Markus Landgraf at TEDxRheinMain – [] The Physics of Space Elevators – [] (this includes the concept of a space launch from an […]

Space Elevator Climber Design

A space elevator is a long ribbon that extends into space and hangs in a state of equilibrium because the centrifugal force throwing the top half of the ribbon out into space balances the force of gravity trying to drag the bottom half down. The elevator becomes functional when a climber car uses the ribbon […]

Juno Arrives at Jupiter

It has taken NASA space probe, Juno, nearly five years to reach Jupiter after traveling over 1.7 billion miles. Juno is now in orbit around Jupiter and NASA hopes to study Jupiter using images and data being relayed back to Earth. At present, it takes transmissions 48 minutes to return to Earth. Juno spacecraft trajectory […]

Space Elevator Fundamentals

A space elevator is a long thin cable, anchored on the Earth end and held in place on the space end by a counterweight of ballast. The central balance point of the cable is located at a geo-synchronous orbit level, keeping the cable steady over the anchor point. The weight of the cable (and ballast) […]

Objects in Space Beyond Neptune

Objects in Space Beyond Neptune

Pluto was once categorized as a planet, because we didn’t have a clear definition of what a planet is and because the objects we called planets were basically all the large objects we found orbiting the Sun. But then things changed. Around the year 2000, a team of astronomers headed by Mike Brown began discovering […]

Orbital Dynamics by NASA

This excellent web site from NASA explains a lot about how orbits work. A geosynchronous orbit at an altitude of 35,786 kilometers (above sea level) allows a satellite to orbit at the same rate the Earth turns, so it always remains over the same spot on the planet below. Lagrange points are orbital sweet spots […]

The Horseshoe Orbit Asteroid

Asteroid 2010 SO16 follows an orbit close to the orbit of Earth. Sometimes it’s a little closer to the Sun at about 0.996 AU and sometimes it’s a little farther from the Sun at 1.004 AU. When the orbit is inside that of Earth, the asteroid travels faster than Earth and slowly catches up to […]

White Dwarf Dyson Sphere

In 1959, physicist and astronomer, Freeman Dyson, published a paper called, “Search for Artificial Stellar Sources of Infrared Radiation”. The paper described a way to maximize utilization of energy from a star by surrounding it with a network of solar energy collectors arranged in a spherical configuration. In popular fiction, this idea has often been […]

Asteroids of Potential Hazard to Earth

Asteroids of Potential Hazard to Earth

Orbits of Potentially Hazardous Asteroids – [] This graphic shows the orbits of all the known Potentially Hazardous Asteroids (PHAs), numbering over 1,400 as of early 2013. These are the asteroids considered hazardous because they are fairly large (at least 460 feet or 140 meters in size), and because they follow orbits that pass close […]

1473 – Copernicus – bio

Nicolaus Copernicus was born in 1473 in Poland. He is known as the first astronomer to claim that the Sun is at the center of the solar system with the Earth rotating about it, instead of the other way around. Copernicus studied at the Universities of Bologna and Padua in Italy and studied under a […]