Exploring Our Solar System

By Jess Aliendi

pre 1900 - Ptolemy

Claudius Ptolemy was born in 90 AD.He was from Alexandera in egypt Roman empire.

His occupation was a Mathamatition, Geographer, Astronomer and a Astrologer.

Dates of discovery

The exact date was not able to be told, but would be between 85-165AD.


Ptolemy thought that the Earth was in the centre of the universe and all the other planets circled it. This flawed view of the Universe was accepted for many centuries. Even starting with this incorrect theory, he was able to predict the movements of the planets, which was a major discovery.

Technologies used at the time

He was able to combine what he saw of the stars' movements with mathematics, especially geometry, to predict the movements of the planets.

Contributions made to our knowledge and understanding of the solar system

His famous work was called the Almagesti. In order to make his predictions true, he worked out that the planets must move in smaller circles, and the Earth itself moved along an equant. None of this was true, but it made the math work for his predictions.

Big image

NASA missions - Galileo

Date of discovery

Galileo was launched on October 18th, 1989. Galileo plunged into Jupiter's atmosphere on September 21st 2003, where it made lots of discoveries.


Galileo discovered that Jupiter has thunderstorms many times larger than Earth's. These storms result from the vertical circulation of water in the top layers, leaving large areas where air descends and becomes dry like a desert, and other areas where water rises to form the thunderstorms. Galileo has also found that Jupiter's rings are made of small dust grains blasted off the surface of Jupiter's four innermost satellites by the impacts of meteoroids.
Big image

Technologies used at the time

Galileo, one of NASA's most greatest deep space exploration projects. In its final stages, the orbiter was a 4.6-meter-tall spacecraft with a probe.

Contributions made to our knowledge and understanding of the solar system.

Jupiter has no solid surface; it is made almost entirely of hydrogen and helium and is hot enough inside to vaporize all elements. After the Galileo probes's mission is completed, it will continue to sink into Jupiter until the temperatures reach points that, in turn, cause various parts of the probe to melt and then vaporize. So therefore we have the knowledge why we cant live on Jupiter.