Mercury – Timeline

 

 

order Pregabalin online Key dates in our history about Mercury
Mul.Apin tablets enter 1 000 BCE
First known recorded observations – on these ancient Babylon tablets where celestial bodies catalogued. They called the planet Nabu, after messenger god.
Hermes, Greek messenger god 350 BCE
Apollo & Hermes – before 4th century BCE Greeks believed that the morning & evening star was two planets (Apollo & Hermes), but latter realised that the planets where one, and called it Hermes.
Mercury’s diameter 500 CE
Indian astronomer – in times before any telescopes with unknown means Mercury’s diameter was estimated with 99% accuracy. This was acquired from Surya Siddhanta.
Galileo’s Observations 1611
Guesses it is a planet – the telescope was not powerful enough to see phases of Mercury but was enough to guess it was a planet.
Transits 1631
Gassendi observations – Pierre Gassendi, French astronomer makes first telescope observation of Mercury’s transit. This in turn helps to make first accurate measurements of Mercury’s size.
Phases 1639
Prove Mercury orbits Sun – Giovanni Zupi, Italian astronomer discovers that mercury has similar phases to our Moon. This breakthrough was made with powerful telescope of those days.
Occultation by Venus 28 May 1737
First time in history – John Bevis, English astronomer makes this historical observation, when one planet passes in front of the other, as sees from Earth.
Mercury’s Clouds 1800 – 1808
Wrong claims – Johann Schroter, German astronomer claims that he seen features such as clouds and mountains on Mercury.
Schiaparelli’s map 1880s
Same side to the Sun – Giovanni Schiaparelli creates most accurate map jet of Mercury. Wrong believes leads him to think that Mercury is tidally locked to Sun, where the planets takes 88 days to orbit Sun and rotate on its axis.
Observing by radar 1962
Moscow’s Institute of Radio-Engineering and Electronics – Vladimir Kotelnikov, Soviet scientists led a team to bounce radar signals for Mercury. They bin first ones to achieve this.
Rotation speed 1965
Two-thirds of the day – Gordon Pettengilll & Rolf Dyce, American astronomers used dish at Arecibo to determine Mercury’s day length.
Mariner 10 1975
Mosaic image – from the first man-made probe to visit this planet images revealing almost half of Mercury’s surface came this mosaic image.
Skinakas Basin 2002
Illusion – Skinakas Astrophysical Observatory’s astronomers believed they found a massive crater missed by Mariner 10. Messenger spacecrafts observations helps to clear this as illusion.
Messenger flyby 2008
First flyby – Messenger makes three flybys before settling to long term orbit. It Maps most of Mercury’s surface in colour, and studies planets atmosphere and magnetosphere.
Orbiting Messenger 2011
Long-term orbit – completes mapping Mercury’s surface. Discovery of water ice in north pole was discovered by space probe, and Messenger keeps sending valuable data back to Earth.

 

 


go to site Reference list:

NASA – Mercury photojournal

Wikipedia – Mercury

USGS – Global Topographic Model of Mercury

youtube – NASA Videos, Messenger playlist