<s>
OpenUniverse	B-Application
is	O
a	O
3D	O
Solar	O
System	O
simulator	O
created	O
by	O
Raúl	B-Application
Alonso	I-Application
Álvarez	I-Application
.	O
</s>
<s>
It	O
uses	O
OpenGL	B-Application
1.1	O
(	O
Implemented	O
through	O
Mesa	B-Application
3D	I-Application
)	O
to	O
simulate	O
the	O
Solar	O
system	O
in	O
complete	O
3D	O
,	O
including	O
its	O
planets	O
and	O
their	O
major	O
and	O
minor	O
moons	O
,	O
along	O
with	O
a	O
few	O
asteroids	O
with	O
real	O
3D	O
models	O
created	O
from	O
real	O
data	O
.	O
</s>
<s>
OpenUniverse	B-Application
is	O
free	B-License
software	I-License
distributed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
OU	O
is	O
compatible	O
with	O
Windows	O
95/98/NT/2000	O
,	O
Linux/Unix	O
,	O
and	O
MacOS	B-Application
(	O
Ported	O
by	O
Sandy	O
Martel	O
,	O
download	O
link	O
lost	O
)	O
,	O
and	O
OpenGL	B-Application
1.1	O
drivers	O
are	O
required	O
for	O
the	O
program	O
to	O
run	O
correctly	O
.	O
</s>
<s>
OU	O
likely	O
served	O
as	O
the	O
inspiration	O
for	O
the	O
much	O
more	O
widely-used	O
interactive	O
planetarium	O
program	O
Celestia	B-Application
,	O
which	O
in	O
itself	O
served	O
as	O
the	O
inspiration	O
for	O
the	O
infamous	O
SpaceEngine	B-Application
procedural	O
universe	O
simulator	O
.	O
</s>
