Tau¹ Serpentis
Encyclopedia
Tau1 Serpentis (Tau1 Ser, τ1 Serpentis, τ1 Ser) is an M-type giant
star
in the constellation
of Serpens, approximately 900 light-years from Earth
. It has an apparent visual magnitude which varies between 5.13 and 5.20.
Giant star
A giant star is a star with substantially larger radius and luminosity than a main sequence star of the same surface temperature. Typically, giant stars have radii between 10 and 100 solar radii and luminosities between 10 and 1,000 times that of the Sun. Stars still more luminous than giants are...
star
Star
A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...
in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
of Serpens, approximately 900 light-years from Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
. It has an apparent visual magnitude which varies between 5.13 and 5.20.