Only about 15% of stars of the entire galaxy host planetary system one of those stars is our Sun. Sun hosts our solar system. According to NASA, Our Sun is named Sol, after the Latin word for Sun, “Solis,” and anything related to the Sun we call “solar.” Sun is in the Orion Spur of the milky-way galaxy. It is believed that the sun was born when the cloud of dust and gaseous particles (solar nebula) collapsed and in the center certain mass condensed into a burning ball of gases resulting from the formation of the sun. Sun is the center of our planetary system and everything around the system revolves within the gravitational force of the sun. The Sun is almost 4.5 billion-year-old a hot glowing ball of hydrogen and helium. Without the energy of the sun, life on earth can’t be imagined. The Sun is the largest known object in our solar system with about 865,000 miles (about 1.4 million kilometers) in diameter.
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Introduction to Astronomy
“Astronomy is the oldest science of humanity”.
Astronomy comes from the Greek language “ἀστρονομία” meaning the science that studies the Law of Stars. Astronomy is a branch of science that deals with the study of celestial objects, space, and the physical universe as a whole. In common terms, Astronomy is the study of everything in the universe except Earth’s atmosphere like the Moon, Sun, planets, other stars, etc.
Continue reading Introduction to AstronomyCertified Information Systems Auditor (CISA)
This certification is issued by ISACA to people in charge of ensuring an organization’s IT and business systems are monitored, managed, and protected. It is presented after the completion of a comprehensive testing and application process. It is designed for IT auditors, audit managers, consultants, and security professionals.
The primary duties of a CISA include:
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