One type of spectrum contains all wavelengths of visible light without any gaps or interruptions. Which type of spectrum is this? 

Giordano Bruno expanded upon Copernican ideas and introduced bold concepts about the nature of the cosmos that challenged traditional beliefs. Which of the following statements reflects one of his key ideas? 

What type of eclipse occurs when the Moon is positioned as shown in the image?  Q16.jpg

Equinoxes are significant astronomical events that occur twice each year as part of Earth’s orbit around the Sun. Which of the following best describes what happens during the event? 

Interstellar travel—the concept of sending spacecraft to other stars—presents a lot of scientific and engineering challenges. What is the primary challenge that it faces?

One technique widely used by deep space mission (Such as voyager 2) is called gravity assist (or gravitational slingshot). What is the main advantage of this technique? 

What is the average temperature of the Sun’s photosphere?

Among the planets in our solar system, one stands out for having an extremely slow rotation, taking longer than any other planet to complete a single day. This planet also has a very dense atmosphere. Which planet is it? 

Telescopes are essential tools in observational astronomy, and they come in two main types: refracting and reflecting. Which of the following is the correct statement about them?

Galileo Galilei was the first one who used telescopes in astronomical observations and made groundbreaking discoveries. Which of the following was one of his significant discoveries?