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On this day in 2003 – January 22nd – Pioneer 10's last signal was received.

Pioneer 10 was the first spacecraft to pass through the asteroid belt, and later the first to pass the orbit of Pluto. Originally designed for a 21-month mission, it lasted more than 30 years.


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On this day in 2003 – January 22nd – Pioneer 10's last signal was received.

Pioneer 10 was the first spacecraft to pass through the asteroid belt, and later the first to pass the orbit of Pluto. Originally designed for a 21-month mission, it lasted more than 30 years.


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On this day in 1986 – January 24th – Voyager 2 flew past Uranus.

This fly-by was the first and only visit of a spacecraft to Uranus.


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On this day in 2004 – January 25th – the Mars rover Opportunity landed on the red planet.

The mission was designed to last 90 Martian days, but it was operational until the summer of 2018 when an exceptionally severe dust storm blanketed Mars for three months. The rover didn't recover from the loss of power, and the mission was officially brought to an end in February 2019.


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On this day in 1736 – January 25th – French mathematician Joseph Lagrange was born.

Lagrange was one of the great minds of the 18th century, and his work included major contributions to physics and astronomy. He's best known now for his identification of equilibrium points between the gravity of the Earth and that the Sun. NASA's SOHO (Solar and Heliospheric Observatory) sits at one of these points.


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On this day in 1994 – January 25th – Clementine was launched.

Over a period of nearly four months the US spacecraft Clementine made scientific observations of the Moon. In addition, the craft was used to test the effects on sensors and components of extended exposure to space.



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On this day in 1983 – January 25th – the Infrared Astronomical Satellite (IRAS) was launched.

IRAS, a joint project of NASA (USA), NIVR (Netherlands) and SERC (UK), was the first space telescope to carry out a survey of the whole night sky at infrared wavelengths.


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On this day in 1978 – January 26th – the International Ultraviolet Explorer (IUE) was launched.

The IUE was a joint effort by the European Space Agency (ESA), the UK Science Research Council and NASA. It was switched off in 1996, after it had worked 14 years beyond its planned lifetime.


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A
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Mona, this doesn't belong here but I couldn't resist:

Astronomers got tired of watching the moon go around the earth for 24 hours, so,
they called it a day.

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Angie, it has the makings of a joke, but pedant that I am (aka a spoilsport), I need to point out that it takes the Moon 29 days to go around the Earth and we call it a month, which doesn't work very well. :)


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