Kepler’s laws of planetary motion
In astronomy and classical physics
laws describing the motion of planets in the solar system.
They were derived by the German astronomer Johannes Kepler
Who announced his first two laws in the year 1609 and a third law nearly a decade later
Astrophysicists seek to understand the universe and our place in it.
At NASA
The aims of its astrophysics work are "to discover how the universe works
Explore how it began and evolved
And search for life on planets around other stars
" according to NASA's website.
NASA states that its astrophysics work grapples with three main questions:
(Image credit:
NASA/ESA/Hubble Heritage Team (STScI/AURA)) Astrophysics is a branch of space science that applies the laws of physics and chemistry to seek to understand the universe and our place in it.
The field explores topics such as :
Life and death of stars
Nebulae and other objects in the universe.
Occasionally the astronomical observations reveal new fundamental laws of Physics
For example the observations of motions of the planets helped Newton discover the universe square law of gravitation
We begin with the motions of the Sun and the Moon as we see them across the sky, then to the motions of the planets
Observation in physical cosmology
Also known as the Hubble–Lemaître law
Is the observation in physical cosmology that galaxies are moving away from Earth at speeds proportional to their distance.In other words
The farther they areThe faster they are moving away from Earth.The velocity of the galaxies has been determined by their redshift
A shift of the light they emit toward the red end of the visible spectrum.
\nThis is a list of scientific laws named after people.For other lists of eponyms
Concept in astronomy
Spörer's law predicts the variation of sunspot latitudes during a solar cycle.It was discovered by the English astronomer Richard Christopher Carrington around 1861.Carrington's work was refined by the German astronomer Gustav Spörer.
