The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
New!!: 9 Lacertae and Apparent magnitude ·
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
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Lacerta is one of the 88 modern constellations defined by the International Astronomical Union.
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A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
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