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In shape and component stars, elliptical galaxies are most like our own
Photon
A quantum of electromagnetic radiation that embodies the concept of light as both a particle and a wave.
Electron
A subatomic particle with a negative charge found in all atoms, contributing to electricity.
Electron
A subatomic particle with a negative charge, found in the electron clouds surrounding the nucleus of an atom.
Q11: There is presently no evidence for large-
Q49: The hot, dense universe shortly after the
Q71: The huge, dark, almost spherical regions between
Q87: Most galaxies are isolated in space.
Q88: Explain the process of small irregular galaxies
Q107: All gamma- ray bursters have the same
Q108: Why is visible light a bad choice
Q119: All pulsars are neutron stars; why is
Q126: Why do the millisecond pulsars violate the
Q170: Hubble divided the spirals into normal and