Astrophysics And Cosmology I - SS3 Physics Past Questions and Answers - page 2
Which of the following is a type of galaxy that has a smooth and symmetrical shape, with no discernible structure?
Spiral galaxy
Elliptical galaxy
Irregular galaxy
Dwarf galaxy
Which of the following is a phenomenon that occurs when a planet or moon passes between the Earth and the Sun, blocking out some or all of the Sun's light?
Solar eclipse
Lunar eclipse
Transit
Occultation
What is observational astronomy?
Observational astronomy is a branch of astronomy that involves collecting and analyzing data from observations of celestial objects such as stars, planets, galaxies, and other cosmic phenomena.
How are telescopes used in observational astronomy?
Telescopes are essential tools for observational astronomy, as they allow us to collect lighter and see more distant objects than our eyes can see. Telescopes work by collecting and focusing light using mirrors or lenses. There are many different types of telescopes, including refracting telescopes, reflecting telescopes, and radio telescopes. Each type has its advantages and disadvantages, and they are used for different types of observations.