Gyulbudaghian's Nebula (HH215)
A Herbig-Haro object –
a variable bipolar nebula generated by shock
waves from a contracting protostar – in the constellation Cepheus.
At the apex of its faint, fan-like shape lies the variable star PV Cephei,
which provides the energy that illuminates the nebula. HH 215 resembles
the classic variable bipolar nebula NGC 2261 ( Hubble's
Variable Nebula) as it varies in shape and brightness and its spectrum
is in a state of continual change.
The name "Gyulbudaghian's Nebula" (pronounced gyool-boo-DAH-ghee-an) originates
from a paper published in Soviet Astronomy Letters (1977).
AND STAR CLUSTERS