Issues in astronomy

ASTRONOMY

It is the study of celestial objects such as: stars, planets, comets, nebulae, star clusters, and galaxies, it is one of the oldest  sciences  and concerned  with the revolution physics, chemistry, meteorology, and motion of celestial objects, as well as the formation and development of the universe.ASTROPHYSICS refers to the branch of astronomy; is the study of the physical processes which control matter and energy in the universe. And it is also the study of physical universe beyond the Earth’s atmosphere including the process of mapping locations and properties of the matter and radiation of the universe.As what i have research ancients before watched stars and  memorized their positions and if there is a new star appeared they record it to their star map.Today astronomers used telescopes to study stars ,planets and galaxies. Astronomers are scientists who study all objects in the universe, they use ground-base telescope like, launch spaces probes that visits other planets in the solar system, and satellite into spaces to study the universe from up above the earth's atmosphere.They study  and analyses the radiation on earth or its vicinity from constituent part of the universe.

The invention of the optical telescope greatly enhanced our view of the night sky, revealing spectacular details of the Moon and planets, and masses of previously unseen stars and nebulae.Spacecraft carry telescopes and other astronomical instruments above the Earth's atmosphere, and to other planets in our solar system. This has created whole new branches of astronomy such as X-ray and Gamma-ray astronomy. These instruments that they invented had help us people a lot like for example the radio telescopes that detect radio objects that are extremely far away and are hard or impossible to see optically, Ultraviolet is used to learn the composition of stars, Infrared is the part of the near-optical spectrum we perceive as heat rays, and these are emitted by stellar objects such as the Sun and there is so much more like X-ray, gamma rays and neutrinos.This inventions help us a lot because it help us know what is beyond our planet, if the other planet can produce life and if we can able to live there.We can able to study the stars and comets, what are they made of. I just hope that this inventions will not be the one who will destroy the peoples life.

Planet in the Solar System

SOLAR SYSTEM

The ancients believe that there were just seven planets including the: Sun, Moon, Venus, Mars, Jupiter, and Saturn and was believed that these planets were very important in the affairs of mankind. The astrological study of their positions among the stars at the moment of one’s birth was supposed to give information about his/her fate. The general character of a person was thought to be determined by which planet she/he was “born under” according to the calculations of astrologers, such superstitions continue in modern time.

As what i have studied and read, I conclude that there is more information behind the solar system that I read a while ago and part of it is the origin of the solar system. It began with a cloud of interstellar gas and or dust is disturbed and collapses under its own gravity. The disturbance could be, for example, the shock wave from a nearby supernova. And then as the cloud collapses, it heats up and compresses in the center. It heats enough for the dust to vaporize. The initial collapse is supposed to take less than 100,000 years.

        The Solar System is composed only of solid proto planetary bodies and gas giants. The gas cools off enough for the metal, rock and ice to condense out into tiny particles. The metals condense almost as soon as the accretion disk forms; the rock condenses a bit later. We all know that the solar system was composed of 8 planets, let’s all know first the inner planets, the nearest in the sun is Mercury the smallest planet, next to mercury is Venus which is the hottest planet, Earth is the largest and densest of the inner planets, and Mars is smaller than Earth and Venus, now let’s go to the outer planets which is Jupiter composed of largely of hydrogen and helium , Saturn second largest moon in the solar system, Uranus is the lightest of the outer planets, and Neptune smaller than Uranus. Now I have learned more about our solar system.