What is the most accurate way to determine the distance to a relatively nearby star (within the Milky Way)?

A) radar ranging
B) stellar parallax
C) using Cepheid variables
D) using white dwarf supernovae
E) applying Hubble's law


B) stellar parallax

Physics & Space Science

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What happens to the core of a star if gravity is strong enough to overcome neutron degeneracy pressure?

A) The core contracts and becomes a white dwarf. B) The core contracts and becomes a ball of neutrons. C) The core contracts and becomes a black hole. D) The star explodes violently, leaving nothing behind. E) Gravity is not able to overcome neutron degeneracy pressure.

Physics & Space Science

You see colors in a rainbow because of diffraction

a. True b. False Indicate whether the statement is true or false

Physics & Space Science

Who discovered the electron in 1897?

a. Ernest Rutherford b. James Chadwick c. J. J. Thomson d. Niels Bohr

Physics & Space Science

The ozone layer absorbs infrared radiation from sunlight

Indicate whether the statement is true or false

Physics & Space Science