Student Led Seminar: Space

Beyond which part of the black hole can we not see anything?

• Singularity

• Event horizon

• Accretion disk

• Innermost stable orbit

What are the 4 types of black holes?

• Spiral, Elliptical, Peculiar, Irregular

• Solar-type, Red-giant, Hot Blue, Neuron

• Beginner, Pre-intermediate, Intermediate, Advanced

• Stellar, Supermassive, Intermediate, Miniature

How many times heavier are stellar black holes than our sun?

• 10-20

• 20-30

• 50-100

• 1000000 (million)

How are stellar black holes formed?

• Within the clouds of dust and scattered throughout most galaxies

• Scientists have not yet figured it out

• When massive stars die and collapse

• With an explosion of space itself

Supermassive black holes exist only at the center of the galaxies.

• True

• False

What is the distance equivalent to the diameter of a black hole "Sagittarius A"?

• From Earth to Moon

• From Earth to Mars

• From Earth to Andromeda galaxy

• From Earth to Sun

Observing the effects of a black hole on nearby matter is not the only way for scientists to detect black holes.

• True

• False

When mixing what do accretion disks appear?

• Quarks, leptons, and bosons

• Gases, dust, and quasars

• Two up quarks and one down quark

• Hydrogen, helium, and carbon

Who calculated that any mass can become a black hole?

• Fritz Zwicky

• Karl Schwarzschild

• Albert Einstein

• Edwin Hubble

When was the first black hole discovered?

• 1971

• 1973

• 1965

• 1982