Cepheid variable stars have masses much larger than our Sun; the more massive stars are more luminous and have more extended envelopes 10. The stars near the centers of galaxies are orbiting at high velocities, which mean that there is the presence of super-massive black holes in the centers of most galaxies. 11. Large galaxies can absorb smaller galaxies called galactic cannibalism. Chapter 14 1.
Which of the following planets is NOT a gas giant? a. Earth b. Jupiter c. Saturn d. Uranus 16. The sun gets its energy from a. burning fuel b. nuclear fusion c. shrinking due to gravity d. convection 17. The number of on any planet can be used to estimate how old the surface is.
*B. sunspots. C. the chromosphere. D. solar wind. 6. The four terrestrial planets that have solid, rocky surfaces are A. Mercury, Jupiter, Saturn, and Mars.B.
Under The Astronomic International Union (IAU) definitions, there are eight planets in the Solar System. In order of increasing distance from the Sun, they are the four terrestrials, Mercury, Venus, Earth, and Mars, then the four gas giants, Jupiter, Saturn, Uranus, and Neptune. Originally, there were nine planets in the Solar System. Nowadays, Pluto has been considered as the dwarf planet. Six of the planets are orbited by one or more natural satellites.
The arrangement of particles in an atom Protons and neutrons make up the main, dense, central nucleus in the centre of the atom. This is surrounded by electrons “orbiting” the main nucleus. The electron are in shells depending on their energy levels, as the most energetic are on the outer shells, because they need more energy to travel around a bigger “orbit” of the nucleus. These shells are full when a certain amount of atoms are in the shell; 2 in the first shell, 8 in the next shell, 8 in the third shell and so on. When the shells are full, the atom is unreactive.
AUCKLAND UNIVERSITY OF TECHNOLOGY THE EXISTENCE OF BLACK HOLES WHAT ARE BLACK HOLES? DO THEY REALLY EXIST? TEVITA PAEA ID: 0102315 LITERATURE REVIEW ESSAYS “WHAT ARE BLACK HOLES?DO THEY EXIST? : If they do, HOW ?”If not: HOW?” Our solar system consists of ten planets revolving around the Sun. The Sun serves as a magnet that uses its gravitational pull to hold the solar system together.
Meteorites are heavy. Most meteorites are much denser than ordinary Earth rocks. The unusual weight is due to high iron content. Even stone meteorites will feel heavier in the hand than most Earth rocks. Meteorites likely traveled in space for millions of years before visiting us here on Earth.
Direct motion and retrograde motion both occur with Mars, direct motion is when the planet seems to be going forward, and retrograde is when it seems to be going backwards. Many astronomers have noticed this and have tried to come to a solution as to why it occurs. Eudoxus of Cnidus Eudoxus of Cnidus came up with the first theory as to why retrograde motion occurs. He thought that there was a system of spheres, a small sphere in the middle on one axis and a larger sphere on another axis; both of the axis’ are offset. The axis of the smaller middle sphere is embedded in the outer sphere so they share the same motion.
No longer are they looked upon as the gods or answers, but they still carry much intrigue for people. The nine planets in our solar system have very unique characteristics, and help us understand many things about the universe. The Solar System contains the Sun, eight planets, at least three dwarf planets, more than 130 satellites, and a large number of small bodies such as comets and asteroids. The Solar System is located in the Milky Way galaxy, which contains about 200 billion stars and multiple other solar systems such as ours. The inner Solar System contains four of the eight planets in our solar system.
The energy released is in the form of increased kinetic energy of the product particles and any radiation emitted. The energy released in a nuclear fission is very much larger compared to the energy released in a chemical reaction. Spontaneous natural nuclear fission reactions very rarely occur. Nuclear fission reactions are normally initiated by bombarding the nucleus with slow neutrons or thermal neutrons of low energy of about 10-2 eV. Nuclear fussion: Nuclear fusion is the process in which two light nuclei combine to form a heavier nucleus.