<s>
Some	O
of	O
them	O
are	O
CalSky	O
,	O
Exoplanet	B-Application
Archive	I-Application
,	O
Exoplanet	O
Data	O
Explorer	O
,	O
Extrasolar	O
Planets	O
Encyclopaedia	O
,	O
Universe	O
Today	O
,	O
Space.com	O
and	O
Galaxy	B-Application
Zoo	O
.	O
</s>
<s>
Out	O
of	O
all	O
these	O
Exoplanet	B-Application
Archive	I-Application
is	O
managed	O
by	O
NASA	O
.	O
</s>
<s>
These	O
websites	O
provide	O
knowledge	O
about	O
exoplanets	O
,	O
eclipses	O
,	O
tides	O
,	O
comets	O
,	O
stars	O
,	O
galaxy	B-Application
and	O
other	O
topics	O
about	O
astronomy	O
.	O
</s>
<s>
The	O
NASA	B-Application
Exoplanet	I-Application
Archive	I-Application
is	O
an	O
online	O
astronomical	O
exoplanet	O
catalog	O
and	O
data	O
service	O
that	O
collects	O
and	O
serves	O
public	O
data	O
that	O
support	O
the	O
search	O
for	O
and	O
characterization	O
of	O
extra-solar	O
planets	O
(	O
exoplanets	O
)	O
and	O
their	O
host	O
stars	O
.	O
</s>
<s>
The	O
archive	O
is	O
funded	O
by	O
NASA	O
and	O
was	O
launched	O
in	O
early	O
December	O
2011	O
by	O
the	O
NASA	O
Exoplanet	O
Science	O
Institute	O
(	O
NExScI	O
)	O
as	O
part	O
of	O
NASA	O
's	O
Exoplanet	B-Application
Exploration	I-Application
Program	I-Application
.	O
</s>
<s>
Galaxy	B-Application
Zoo	O
is	O
an	O
online	O
astronomy	O
project	O
which	O
invites	O
members	O
of	O
the	O
public	O
to	O
assist	O
in	O
the	O
morphological	O
classification	O
of	O
large	O
numbers	O
of	O
galaxies	B-Application
.	O
</s>
<s>
An	O
improved	O
version	O
—	O
Galaxy	B-Application
Zoo	O
2	O
—	O
went	O
live	O
on	O
17	O
February	O
2009	O
.	O
</s>
<s>
The	O
current	O
iteration	O
of	O
the	O
project	O
,	O
launched	O
in	O
April	O
2010	O
,	O
is	O
Galaxy	B-Application
Zoo	O
:	O
Hubble	O
,	O
and	O
uses	O
Hubble	O
Space	O
Telescope	O
survey	O
data	O
.	O
</s>
<s>
Its	O
stories	O
are	O
often	O
syndicated	O
to	O
other	O
media	O
outlets	O
,	O
including	O
CNN	B-Architecture
,	O
MSNBC	O
,	O
Yahoo	O
!,	O
and	O
USA	O
Today	O
.	O
</s>
<s>
Space.com	O
was	O
founded	O
by	O
former	O
CNN	B-Architecture
anchor	O
Lou	O
Dobbs	O
and	O
Rich	O
Zahradnik	O
,	O
in	O
July	O
1999	O
.	O
</s>
<s>
At	O
that	O
time	O
,	O
Dobbs	O
owned	O
a	O
sizeable	O
share	O
of	O
the	O
company	O
,	O
and	O
,	O
in	O
an	O
unexpected	O
move	O
,	O
left	O
CNN	B-Architecture
later	O
that	O
year	O
to	O
become	O
com	O
's	O
chief	O
executive	O
officer	O
.	O
</s>
<s>
In	O
2008	O
the	O
site	O
was	O
briefly	O
banned	O
for	O
about	O
a	O
day	O
from	O
Digg.com,	O
and	O
then	O
unbanned	O
.	O
</s>
<s>
In	O
March	O
2011	O
,	O
Businessweek	O
reported	O
that	O
the	O
site	O
had	O
lost	O
20	O
percent	O
of	O
its	O
traffic	O
in	O
five	O
days	O
after	O
a	O
change	O
in	O
the	O
page	O
ranking	O
algorithm	O
of	O
Google	B-Application
.	I-Application
</s>
