Main-sequence stars; those are stars that are in a certain area in the H-R diagram. They are also the stars which burn (fuse) hydrogen-1, converting it into helium-4.
Black holes dont appear on HR diagrams because HR diagrams are used to classify stars not find black holes Black holes emit no visible light (are not luminous enough) and therefore do not appear in the HR diagram.
Universe
Astrobiology deals with the origin of the universe, the universe's composition, future of life in the universe, distribution of the universe, etc.
The universe is vast.The Hubble Telescope has photographed parts of the universe.I cannot imagine how the universe evolves.
A schematic diagram would be an infinitely long straight line. Unfortunately, you cannot draw an infinitely long line - the universe is just not big enough!
At least two pairs: they form the outer rectangle which represents the "universe".
God's realm includes the physical universe. Were it expressed in Venn Diagram--God's realm would be a big circle; the physical universe would be a smaller circle, entirely within the big circle.
He made it easier to understand the meaning of union, intersection and disjoint when used in set theory. Johnn Venn was suspicious about the world or universe,
You draw a rectangle for the universe of all things in your set and then you draw circles inside the rectangle for each set. If the sets have a non-zero intersections, than you draw and overlap of the circles to show that. So the venn diagram consists of overlapping circles. The combined area of the circles is the union. By the universe, I mean all possible things that you are dealing with. For example, If you are looking at a school, that would be the universe. Maybe one set is students taking chemistry and one is students taking math. Those are two circles. They probably overlap and the overlap is the intersection. The union is the students taking both. The rectangle represents all students in the school.
Main-sequence stars; those are stars that are in a certain area in the H-R diagram. They are also the stars which burn (fuse) hydrogen-1, converting it into helium-4.
neat diagram
No, there is not there is no edge to the universe, and there is nothing outside of the universe. there just IS the universe.
This model of the universe placed the Earth at the center of the universe
yes it is a diagram its a cb4 diagram
a universe
Minerals, like everything else in the universe, are made up of elements, which are then made up of atoms, etc. A good web-based diagram of the periodic table of the elements can be found here: http://www.webelements.com/