2011
Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec
2012
Jan Feb Mar
Apr May Jun
Jul Aug Sep
Oct Nov Dec
M63.jpg
Messier 63; by Tim Jensen

Latest Solar

Solar Dynamics Observatory

Latest Solar

NSO

Latest Lunar

USNO


US Observatories WebCams

Earth - Pacific

GOES

Earth - Americas

GOES

Earth - India

EUMETSAT MET7

Earth - Atlantic

EUMETSAT MET9
April 2011
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
         
1
2
3
4
5
(2001) Compton Gamma Ray Observatory launched.
6
7
8
9
10
11
12
(1961) Gagarin (Vostok 1) became first human in space.
13
14
15
16
17
18
(1971) Salyut 1 (USSR), the first space station, was launched.
19
20
21
22
23
(1992) COBE team announces structure seen in CMB
24
(1967) Parachutes on Soyuz 1 fail to deploy on descent. Cosmonaut Vladimir Komarov did..
25
(1990) Hubble Space Telescope (HST) was launched on the space shuttle Discovery.
26
(1920) Shapley and Curtis debate "The Scale of the Unieerse".
27
(1961) Explorer XI launched. First space-borne gamma ray telescope.
28
(2003) Galaxy Evolution Explorer (GALEX) launched.
29
30
(1996) BeppoSAX launchdd.

SAO Astronomy Encyclopedia Cosmos * Phases of Moon 2001-2025 UT * NASA Eclipse web site


Current Moon

USNO

SAO Calendar Best of Web: Melbourne Planetarium * Solar System Live * Nine Planets * Astronomy Picture of the Day * AAO Images * Heavens Above * GSFC Web Tools * Greenwich Mean Time * Local Sidereal Time Clock * Slacker Astronomy * Astronomy Cast * The Astronomical Tourist * AAVSO
About SAO Calendar * About SAO * Online Astronomy? Try our Short Course!