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On this day in 1852 – February 13th – Johan Dreyer was born in Copenhagen.

Dreyer was a prominent astronomer and writer. He was born in Denmark but became a British citizen. Dreyer is best remembered for his New General Catalogue of Nebulae and Clusters of Stars (based on the Herschel catalogues of nebulae). The catalogue numbers are still in use, prefixed by NGC.
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On this day in 1898 – February 14th – Swiss astronomer and physicist Fritz Zwicky was born in Varna, Bulgaria.

Zwicky studied physics and mathematics at the Swiss Federal Polytechnic in Zurich. In 1925 he immigrated to the United States to work with Robert Andrews Millikan at Caltech, but remained a Swiss citizen all his life. Zwicky was quite eccentric in many ways, but made important contributions in several areas of astronomy, carrying out research at both Mt Wilson and Palomar observatories.
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On this day in 1980 – February 14th – NASA's Solar Maximum mission was launched.

Solar Max was designed to investigate solar phenomena, particularly solar flares.
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On this day in 1990 – February 14th – NASA's Voyager 1 took a Family Portrait, looking towards the Sun from 6 billion km away.

Earth is only one pixel of the image, christened by Carl Sagan "the pale blue dot".
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On this day in 2011 – February 14th – the Stardust-NExT spacecraft made a close flyby of comet Tempel 1.

It was NASA's second visit to Tempel 1, because the Deep Impact mission had visited it in 2005, sending an impactor in order to learn about the comet's interior..
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On this day in 1564 – February 15th – Galileo Galilei was born in Pisa, Italy.

Galileo was one of the first to use a telescope to observe the heavens. He's known for his astronomical discoveries, his experimental physics and, of course, his getting in trouble with the Church.
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On this day in 1973 – February 15th – Pioneer 10 became the first ever spacecraft to cross the asteroid belt.

Pioneer 10 was launched in 1972, and is is now nearly four times farther away from the Sun than Pluto is.
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On this day in 2013 – February 15th – a meteor explosion occurred over Chelyabinsk in Russia causing around 1500 injuries.

The meteoroid was about 20 meters across with a mass of 12,000-13,000 metric tonnes. Fortunately, the explosion occurred high in the atmosphere and the atmosphere absorbed much of the energy. However the shock waves caused a lot of damage, and many of the injuries were from flying glass.
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On this day in 1514 – February 16th – Georg Joachim de Porris was born in Feldkirch in present-day Austria.

The mathematician, astronomer and cartographer, better known as Rheticus, is best remembered for facilitating the publication of De Revolutionibus Orbium Coelestium (On the Revolutions of the Heavenly Spheres) by Copernicus.
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On this day in 1914 – February 16th – Gerard Kuiper discovered Miranda, a moon of Uranus.

It was the first discovery of a Uranian moon since William Lassell's discovery of Ariel and Umbriel in 1851.
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