UNIVERSEH: The European Space University

Kepler’s laws of planetary motion are one of the most basic concepts of astronomy. In short, these correct Copernicus heliocentric theory by replacing circular orbits with elliptical ones, and explain the motion of planets.

There are three Kepler laws of planetary motion:

1. Each planet's orbit about the Sun is an ellipse.

2. Planets do not move with constant speed along their orbits.

3. The period for a planet to orbit the Sun increases rapidly with the radius of its orbit.

These were published in the XVII century and confirmed by Isaac Newton and are known as his laws of motion and law of universal gravitation. 

Kepler - a surname from German

law - /lɔː/, Old English lagu, from Old Norse lag ‘something laid down or fixed’, of Germanic origin and related to lay.

Kepler’s three laws of planetary motion explain how an astronomical body would orbit the heavy gravitational object. 

I forgot to use Kepler’s laws during my science test, so I failed.

lois de Kepler

Keplerschen Gesetzen

prawa Keplera

Keplers lagar

https://solarsystem.nasa.gov/resources/310/orbits-and-keplers-laws

The Kuiper Belt is a ring of rocky objects floating alongside our Solar System beyond Neptune. It extends outwards from Neptune’s orbit thousands of AU (astronomical units).

The Kuiper Belt is similar to the asteroid belt (the one between Mars and Jupiter), but it is far larger. It consists of small rocky creatures, among which are so called dwarf planets: Pluto, Haumea, Makemake etc.

It is believed that many bodies found nowadays inside of it are as old as our Solar System. 

It was being discovered little by little during the twentieth century. Firstly, there was just an idea given by Gerard Kuiper, that Pluto cannot be alone in the outer Solar System. After many precise calculations and continuous observation of the sky, in 1992, two scientists, Dave Jewitt and Jane Luu, found a second Kuiper Belt Object (KBO), confirming the theory.