The astronomical magnitude system, initially developed by Hipparchus and refined by Ptolemy, quantifies the brightness of celestial objects, with brighter objects having lower magnitudes. Norman R.
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How did Edwin Hubble prove Andromeda was a galaxy?
How did a Cepheid variable star help Edwin Hubble prove the Andromeda Nebula was a galaxy? Roger Brady San Quentin, California Cepheids are rare variable stars with periods ranging from about 1 to 120 ...
Astronomy on MSN
Why do brighter astronomical objects have negative magnitudes?
What is the baseline for determining the magnitude scale of celestial objects? Why do brighter objects have negative numbers? Dean TreadwayKnoxville, Tennessee The first observer to catalog ...
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