Sunday	Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
				1      9 years ago, in 1949: Gerard Kuiper discovers one of Neptune's moons, Nereid.	2      178 years ago, in 1780: The first binary star system to be discovered, Xi Ursae Majoris, is found by William Herschel.	3      297 years ago, in 1661: Christiaan Huygens observes the planet Mercury transit the Sun.      243 years ago, in 1715: During an eclipse in England, Edmond Halley is the first to report the phenomenon later known as Baily's Beads.
4	5	6      205 years ago, in 1753: Charles Messier makes his first documented observation; the Mercury transit of the Sun.      40 years ago, in 1918: The 72 inch Plaskett telescope at The Dominion Astrophysical Observatory in Saanich, British Columbia sees first light.	7	8	9      36 years ago, in 1922: Tthe IAU passes a resolution to formally adopt Annie Jump Cannon's stellar classification system.	10      12 years ago, in 1946: A White Sands modified V-2 rocket reaches 69 miles (111 kms).
11      177 years ago, in 1781: The Sombrero Galaxy (M104) is discovered by Pierre Méchain.	12      28 years ago, in 1930: The first planetarium in the United States, Adler Planetarium in Chicago, is opened to the public.	13      225 years ago, in 1733: Birger Wassenius of Sweden, observing an eclipse near Göteborg, is the first to report prominences visible to the unaided eye; he incorrectly attributes them to the Moon.      97 years ago, in 1861: John Tebbutt of Australia discovers the Great Comet of 1861 (C/1861 J1).	14	15       1 year ago, in 1957: The first launch of a Soviet R-7 Semyorka leads to an unintended crash 400 km (250 mi) from the launch site.        This year: Sputnik 3 is launched to explore the upper atmosphere and near space.	16	17      76 years ago, in 1882: On an expedition in Egypt , Dr. Arthur Schuster sees a comet (Tewfik) near the Sun during a total eclipse.
18	19	20	21      174 years ago, in 1784: William Herschel discovers NGC 6287, a globular cluster in the constellation Ophiuchus.	22      174 years ago, in 1784: William Herschel discovers NGC 6284, a globular cluster in the constellation Ophiuchus.      12 years ago, in 1946: A White Sands WAC Corporal reaches the then-defined edge of space, 50 miles (80 kms).	23        This year: Explorer 1 makes its final transmission.	24      415 years ago, in 1543: Nicolaus Copernicus dies at age 70 in Frauenburg, Royal Prussia, Kingdom of Poland.      123 years ago, in 1835: John Herschel discovers NGC 6325, a globular cluster in the constellation Ophiuchus.
25	26	27	28	29      39 years ago, in 1919: Arthur Eddington confirms Einstein's theory of general relativity during a total solar eclipse.	30	31      23 years ago, in 1935: The David Dunlap Observatory in Richmond Hill, Ontario, housing a 74-inch (1.88 m) reflector telescope (still the largest in Canada), has its official opening .