Hot, low-density gas can be detected in galactic clusters through X-ray emission. The gas is important in understanding dark matter because ____.
a. dark matter is responsible for heating the gas
b. dark matter must make the cluster massive enough to hold on to the hot gas
c. the gas may be the source of dark matter
d. the gas is clumped in empty places between galaxies where there is more dark matter
e. the gas is produced by dark matter
Question 2
Why aren't optical or radio telescopes used in particle astronomy, which studies cosmic waves and gravity waves?
a. Cosmic and gravity waves are too dangerous to detect.
b. Particle astronomy can only be studied in deep space.
c. Cosmic and gravity waves are too large of particles for ground-based telescopes.
d. Optical and radio telescopes can only detect electromagnetic radiation.
e. Optical and radio telescopes are not technologically advanced enough to capture these particles.
Supermassive Black Holes as Engines for Galactic Activity
What is the longest wavelength of light that can cause photoelectron emission fr
Physics - Density and Pressure
Physics - Density, Pressure, and Pascal's Principle
Physics - Pressure, Density, Pascal's Principle
Synaptic Density