<s>
Stellarium	B-Application
is	O
a	O
free	B-License
and	I-License
open-source	I-License
planetarium	B-Application
,	O
licensed	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
version	O
2	O
,	O
available	O
for	O
Linux	B-Application
,	O
Windows	B-Application
,	O
and	O
macOS	B-Application
.	O
</s>
<s>
A	O
port	O
of	O
Stellarium	B-Application
called	O
Stellarium	B-Application
Mobile	B-Application
is	O
available	O
for	O
Android	B-Application
,	O
iOS	B-Application
,	O
and	O
Symbian	B-Operating_System
as	O
a	O
paid	O
version	O
,	O
being	O
developed	O
by	O
Noctua	O
Software	O
.	O
</s>
<s>
All	O
versions	O
use	O
OpenGL	B-Application
to	O
render	O
a	O
realistic	O
projection	O
of	O
the	O
night	B-Application
sky	I-Application
in	O
real	B-General_Concept
time	I-General_Concept
.	O
</s>
<s>
Stellarium	B-Application
was	O
featured	O
on	O
SourceForge	B-Application
in	O
May	O
2006	O
as	O
Project	O
of	O
the	O
Month	O
.	O
</s>
<s>
In	O
2006	O
,	O
Stellarium	B-Application
0.7.1	O
won	O
a	O
gold	O
award	O
in	O
the	O
Education	O
category	O
of	O
the	O
Les	O
Trophées	O
du	O
Libre	O
free	B-Application
software	I-Application
competition	O
.	O
</s>
<s>
A	O
modified	O
version	O
of	O
Stellarium	B-Application
has	O
been	O
used	O
by	O
the	O
MeerKAT	B-Application
project	O
as	O
a	O
virtual	O
sky	O
display	O
showing	O
where	O
the	O
antennae	O
of	O
the	O
radiotelescope	O
are	O
pointed	O
.	O
</s>
<s>
In	O
December	O
2011	O
,	O
Stellarium	B-Application
was	O
added	O
as	O
one	O
of	O
the	O
"	O
featured	O
applications	O
"	O
in	O
the	O
Ubuntu	B-Language
Software	I-Language
Center	I-Language
.	O
</s>
<s>
The	O
fisheye	O
and	O
spherical	O
mirror	O
distortion	O
features	O
allow	O
Stellarium	B-Application
to	O
be	O
projected	O
onto	O
domes	O
.	O
</s>
<s>
Spherical	O
mirror	O
distortion	O
is	O
used	O
in	O
projection	O
systems	O
that	O
use	O
a	O
digital	B-Device
video	I-Device
projector	I-Device
and	O
a	O
first	O
surface	O
convex	O
spherical	O
mirror	O
to	O
project	O
images	O
onto	O
a	O
dome	O
.	O
</s>
<s>
Such	O
systems	O
are	O
generally	O
cheaper	O
than	O
traditional	O
planetarium	B-Application
projectors	O
and	O
fish-eye	O
lens	O
projectors	O
and	O
for	O
that	O
reason	O
are	O
used	O
in	O
budget	O
and	O
home	O
planetarium	B-Application
setups	O
where	O
projection	O
quality	O
is	O
less	O
important	O
.	O
</s>
<s>
Various	O
companies	O
which	O
build	O
and	O
sell	O
digital	O
planetarium	B-Application
systems	O
use	O
Stellarium	B-Application
,	O
such	O
as	O
e-Planetarium	O
.	O
</s>
<s>
Digitalis	O
Education	O
Solutions	O
,	O
which	O
helped	O
develop	O
Stellarium	B-Application
,	O
created	O
a	O
fork	B-Application
called	O
Nightshade	B-Application
which	O
was	O
specifically	O
tailored	O
to	O
planetarium	B-Application
use	O
.	O
</s>
<s>
VirGO	O
is	O
a	O
Stellarium	B-Application
plugin	O
,	O
a	O
visual	O
browser	O
for	O
the	O
European	O
Southern	O
Observatory	O
(	O
ESO	O
)	O
Science	O
Archive	O
Facility	O
which	O
allows	O
astronomers	O
to	O
browse	O
professional	O
astronomical	O
data	O
.	O
</s>
<s>
Stellarium	B-Application
Mobile	B-Application
is	O
a	O
fork	B-Application
of	O
Stellarium	B-Application
,	O
developed	O
by	O
some	O
of	O
the	O
Stellarium	B-Application
team	O
members	O
.	O
</s>
<s>
It	O
currently	O
targets	O
mobile	B-Application
devices	O
running	O
Symbian	B-Operating_System
,	O
Maemo	B-Operating_System
,	O
Android	B-Application
,	O
and	O
iOS	B-Application
.	O
</s>
<s>
Some	O
of	O
the	O
mobile	B-Application
optimisations	O
have	O
been	O
integrated	O
into	O
the	O
mainline	O
Stellarium	B-Application
product	O
.	O
</s>
