u930973931_answers

50 Score: 0 Attempted: 0/50 Subscribe 1. What is the primary source of high-energy photons in the universe? (A) Stars (B) Supernovae (C) Black holes and neutron stars (D) Planets 2. X-ray astronomy mainly studies which cosmic objects? (A) Planets (B) Cold molecular clouds (C) Hot and compact objects (D) Globular clusters 3. The Crab … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. Gravitational waves were first directly detected in which year? (A) 2014 (B) 2015 (C) 2016 (D) 2017 2. The first direct detection of gravitational waves was announced by: (A) LISA (B) LIGO (C) Virgo (D) Einstein Telescope 3. Who first predicted the existence of gravitational waves? (A) Isaac … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. Which component dominates the mass of galaxies? (A) Gas (B) Stars (C) Dark matter (D) Dust 2. What type of galaxy is the Milky Way classified as? (A) Elliptical (B) Irregular (C) Barred spiral (D) Lenticular 3. Which galaxy is on a collision course with the Milky Way? … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. Who first discovered that galaxies are moving away from us, leading to the concept of an expanding universe? (A) Edwin Hubble (B) Albert Einstein (C) Vesto Slipher (D) Georges Lemaître 2. What is the primary evidence for the expansion of the universe? (A) Cosmic microwave background (B) Galaxy … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. Who first proposed the General Theory of Relativity, the foundation of modern cosmology? (A) Newton (B) Hubble (C) Einstein (D) Friedmann 2. Who discovered the expansion of the universe? (A) Hubble (B) Kepler (C) Copernicus (D) Planck 3. The Cosmic Microwave Background (CMB) is the remnant radiation from: … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. Stellar dynamics is primarily concerned with the study of? (A) Nuclear fusion in stars (B) Motion of stars under mutual gravity (C) Planetary orbits (D) Chemical composition of stars 2. The Virial Theorem relates? (A) Kinetic and potential energy in a gravitational system (B) Temperature and luminosity of … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. Ultraviolet astronomy studies which type of radiation? (A) Infrared (B) Ultraviolet (C) X-rays (D) Radio waves 2. Ultraviolet (UV) radiation has wavelengths shorter than: (A) Visible light (B) Infrared light (C) X-rays (D) Radio waves 3. The wavelength range of ultraviolet astronomy is approximately: (A) 10–400 nm (B) … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. Stellar dynamics is primarily concerned with the study of? (A) Nuclear fusion in stars (B) Motion of stars under mutual gravity (C) Planetary orbits (D) Chemical composition of stars 2. The Virial Theorem relates? (A) Kinetic and potential energy in a gravitational system (B) Temperature and luminosity of … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. The nebular hypothesis of planet formation was first proposed by? (A) Laplace (B) Newton (C) Hubble (D) Copernicus 2. According to the nebular hypothesis, planets formed from? (A) Fragments of asteroids (B) Collapse of a molecular cloud (C) Remnants of comets (D) Captured stars 3. Which theory suggests … Read more

50 Score: 0 Attempted: 0/50 Subscribe 1. The monolithic collapse model of galaxy formation was proposed by? (A) Eggen, Lynden-Bell, and Sandage (B) Hubble (C) Hoyle (D) Zwicky 2. The hierarchical model of galaxy formation suggests that galaxies formed by? (A) Rapid collapse of a single cloud (B) Merging of smaller sub-galactic units (C) Continuous … Read more