Astronomy and Cosmology

A supernova is the catastrophic explosion of a massive star at the end of its life cycle, releasing an enormous amount of energy and often outshining its entire host galaxy for weeks. This occurs when the star's core collapses after iron accumulation, causing a rebound explosion.

When a neutron star spins rapidly, it emits beams of electromagnetic radiation from its magnetic poles. As these beams sweep across Earth like a lighthouse, we detect regular pulses of radio waves, earning it the name 'pulsar' (pulsating star).

Ursa Major (the Great Bear) contains the well-known asterism called the Big Dipper, which consists of seven bright stars forming a ladle or dipper shape. The Big Dipper is one of the most recognizable star patterns in the northern sky and has been used for navigation for centuries.

Planets are not luminous objects. They do not give light energy of their own. Thus, this is the correct option.

The glow worm is a medium to large sized invertebrate that is famous for having a green and yellow coloured light on the end of it's tail. This is the correct option.

Yes, it is the correct answer. Aircraft are human made. They are not celestial object.

Yes, it is the correct answer. Both the celestial bodies are stars.

Yes, it is correct, as all are matched correctly.

A meteor is a small piece of rock or debris from space that enters Earth's atmosphere and burns up due to friction, creating a streak of light. This is the correct scientific definition. Option A is incorrect because stars are massive celestial bodies, not small debris. Option C confuses meteors with constellations, and D incorrectly describes comets.

Stars, nebulae, and galaxies are natural celestial sources of light. Fire is a chemical combustion process and while it produces light and heat, it is not a natural astronomical source of light like celestial objects.

Yes, it is correct. The Big Dipper is a group of seven bright stars, 3 which form a handle and 4 which form a bowl.

Yes, it is matched correctly. Orion, which appears like a human figure with a belt, often referred to as The Hunter. Leo, which contains bright stars that outline the form of a lion. Mercury is a planet called as Budh and Pluto is a dwarf planet.

Yes, it is correct. A meteor is usually a small object that occasionally enters the earth’s atmosphere. The friction due to the atmosphere heats it up. It glows and evaporates quickly. That is why the bright streak lasts for a very short time.

Cosmic noise, also called cosmic background radiation, is electromagnetic radiation from distant stars and galaxies that reaches Earth. Option A refers to lightning, option B to solar flares (solar noise), and option D is man-made industrial noise.