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Light Speed Is Relatively Slow

We usually think of light as being extremely fast because it is the fastest thing we have been able to observe so far. The physics of relativity theory by Einstein suggests to us that the speed of light is an absolute limit built into the fabric of space and time as we observe it. This […]

Niku Is A Rebel From The Oort Cloud

Niku Is A Rebel From The Oort Cloud

Niku is an object that orbits our Sun, but at a great enough distance to be considered a “trans-neptunian object”. Objects with an average orbital distance from the Sun greater than the orbit of Neptune (at 30 AU), earn this tag. Niku is likely to be a chunk of rock, but it might also contain […]

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 […]

The Difference Between Asteroids, Comets, and Dwarf Planets

Ceres was discovered in 1801 as the first asteroid. Pluto was discovered in 1930 as the ninth planet in the Solar System. But recently, it was reclassified as a “dwarf planet”. Let’s take a look at how the classification works for asteroids, comets, and dwarf planets: Asteroid – a mostly rocky object that is smaller […]

Scale Solar System

The problem with representing the scale of the Solar System is getting both a correct proportion of the orbits and a correct proportion of the planet sizes at the same time. To Scale: The Solar System – [] On a dry lakebed in Nevada, a group of friends build the first scale model of the […]

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 […]

Lunar Space Elevator

A space elevator is a long cable hung from an object in geo-stationary orbit, so that payloads can climb up the cable into orbit at low cost compared to rocket blast-offs. The cable has to be made of strong but light material and the climber must be supplied with power. This concept was recently only […]

Farewell to Voyager

Farewell to Voyager

Voyager 1 is at the edge of our Solar System and poised to leave us forever. Our Sun is constantly pushing a stream of charged particles, that we call the solar wind, outward beyond all the planets in our system. This area of solar wind is called the heliosphere. The space beyond the reach of […]

Kuiper Belt

Discovered in 1992, the Kuiper Belt is a large expanse of space just outside the edge of our solar system that contains a large number of small objects. This belt is similar to the asteroid belt, but is much larger, much farther away and may contain more frozen water and volatile gases than the metallic […]

Titius Bode

The Titius Bode law or hypothesis is a theory that planetary orbits in the Solar System are spaced in a proportional progression such that each successive orbit is roughly twice the distance from the Sun as the orbit just inside it. Titius-Bode Law – [] The Titius-Bode Law or Rule is the observation that orbits […]