<s>
Aladin	B-Application
is	O
an	O
interactive	O
software	O
sky	O
atlas	O
,	O
created	O
in	O
France	O
.	O
</s>
<s>
It	O
allows	O
the	O
user	O
to	O
visualize	O
digitized	O
astronomical	O
images	O
,	O
superimpose	O
entries	O
from	O
astronomical	O
catalogues	O
or	O
databases	O
,	O
and	O
interactively	O
access	O
related	O
data	O
and	O
information	O
from	O
the	O
SIMBAD	O
database	O
,	O
the	O
VizieR	B-Application
service	O
and	O
other	O
archives	O
for	O
all	O
known	O
sources	O
in	O
the	O
field	O
.	O
</s>
<s>
Created	O
in	O
1999	O
,	O
Aladin	B-Application
has	O
become	O
a	O
widely	O
used	O
VO	B-Application
portal	O
capable	O
of	O
addressing	O
challenges	O
such	O
as	O
locating	O
data	O
of	O
interest	O
,	O
accessing	O
and	O
exploring	O
distributed	O
datasets	O
,	O
visualizing	O
multi-wavelength	O
data	O
.	O
</s>
<s>
Compliance	O
with	O
existing	O
or	O
emerging	O
VO	B-Application
standards	O
,	O
interconnection	O
with	O
other	O
visualisation	O
or	O
analysis	O
tools	O
,	O
and	O
ability	O
to	O
easily	O
compare	O
heterogeneous	O
data	O
are	O
key	O
features	O
allowing	O
Aladin	B-Application
to	O
be	O
a	O
powerful	O
data	B-General_Concept
exploration	I-General_Concept
and	O
integration	B-General_Concept
tool	O
,	O
and	O
a	O
science	O
enabler	O
.	O
</s>
<s>
Aladin	B-Application
is	O
developed	O
and	O
maintained	O
by	O
the	O
Centre	O
de	O
données	O
astronomiques	O
de	O
Strasbourg	O
(	O
CDS	O
)	O
and	O
released	O
under	O
the	O
GNU	B-License
GPL	I-License
v3	O
.	O
</s>
