My World

Space Shuttle Display Model

The Space Shuttle was a partially reusable low Earth orbital spacecraft system that was operated from 1981 to 2011 by the U. S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program name was Space Transportation System (STS), taken from a 1969 plan for a system of reusableRead more

Outer Space

Tiangong-1 Experimental Space Station

On 21 March 2016, after a lifespan extended by two years, the China Manned Space Engineering Office announced that Tiangong-1 had officially ended its service. They went on to state that the telemetry link with Tiangong-1 had been lost. A couple of months later, amateur satellite trackers watching Tiangong-1 found that China’s space agency hadRead more


Falcon 9 vs Atlas V

Falcon 9 is a partially reusable two-stage-to-orbit medium lift launch vehicle designed and manufactured by SpaceX in the United States. It is powered by Merlin engines, also developed by SpaceX, burning cryogenic liquid oxygen and rocket-grade kerosene (RP-1) as propellants. Its name is derived from the Millennium Falcon and the nine engines of the rocket’sRead more

Planet Earth

Oort Cloud Sistema Solar

The Oort cloud is thought to occupy a vast space from somewhere between 2,000 and 5,000 au (0. 03 and 0. 08 ly) to as far as 50,000 au (0. 79 ly) from the Sun. Some estimates place the outer edge at between 100,000 and 200,000 au (1. 58 and 3. 16 ly). The region can be subdivided into a sphericalRead more

New Moon

Solar System Blog

The Solar System formed 4. 6 billion years ago from the gravitational collapse of a giant interstellar molecular cloud. The vast majority of the system’s mass is in the Sun, with the majority of the remaining mass contained in Jupiter. The four smaller inner planets, Mercury, Venus, Earth and Mars, are terrestrial planets, being primarily composedRead more