Astronomy

Question 1

Supernova

Answer 1

Stars whose luminosity increases enormously due to exploding

Question 2

Neutron Star

Answer 2

Star with the density of nuclear matter

Question 3

Black Hole

Answer 3

An object whose escape velocity is greater than the speed of light

Question 4

White dwarf

Answer 4

The remaining glowing core of a star that could not undergo further fusion

Question 5

Main Sequence Star

Answer 5

A star that is fusing H in its core and has a stable balance of outward pressure from core nuclear fusion and gravitational forces pushing inward

Question 6

Red Giant

Answer 6

A very large star of high luminosity and low surface temperature. Red giants are thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion

Question 7

Schwarzschild Radius

Answer 7

The radius of the event horizon surrounding a black hole

Question 8

Doppler Effect

Answer 8

The apparent change in wave frequency during the relative motion between a wave source and its observer

Question 9

Blue Shift

Answer 9

The displacement of the spectrum to shorter wavelengths in the light coming from distant celestial objects moving towards the observer

Question 10

Red Shift

Answer 10

The displacement of the spectrum to longer wavelengths in the light coming from distant celestial objects moving away from the observer

Question 11

Hubble’s Law

Answer 11

The speed of recession of galaxies are proportional to their distance from the earth