This two dimensional temperature and luminosity classification scheme is based on spectral lines sensitive to stellar temperature and surface gravity.
Different types of solar systems in the universe.
In terms of physical features the different kinds of star are usually compared with our nearest stellar companion the sun.
The types of star identified below will be described in terms of the sun.
The following is a list of planet types by their mass orbit physical and chemical composition or by another classification.
When you mix and match different types of stars in various odd couple stellar apartments the results get interesting.
Known as the solar system our stomping grounds are not only a tiny fraction of the universe as we know it but is also a.
The planet mercury innermost world of our solar system.
Under the iau definition true or major.
The statistics above give the solar values.
Below is a brief overview of the eight true planets in our solar system moving from that closest to the sun to farthest from the sun.
To understand the scale the notation 1026 means the number has 26 zeroes after it.
Consider our own solar system where the sun and planets formed together out.
A galaxy is a system of solar systems and other stars.
The universe is a very big place and we occupy a very small corner of it.
Galaxies like solar systems are held together by gravity.
Explore beyond our solar system in depth.
This galaxy is thought to contain more than 200 billion different.
The iau defines that a planet in the solar system must orbit around the sun has enough mass to assume hydrostatic equilibrium and has cleared its neighborhood there is currently no accepted definition for exoplanets.
That s just how many we ve found so far.
The exact size of the universe is unknown.
The universe is a vast expanse of space which contains all of everything in existence.
According to hindu mythology the age of the universe 8 64 billion years is more than the currently estimated age of the solar system.
Our planetary system is the only one officially called solar system but astronomers have discovered more than 2 500 other stars with planets orbiting them in our galaxy.
Our solar system is just one specific planetary system a star with planets orbiting around it.
Scientists believe the universe is still expanding outward.
The universe contains all of the galaxies stars and planets.
In galaxies the solar systems are separated by vast sections of mostly empty space.
The galaxy that contains the earth and its solar system is called the milky way.