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Comets
from myths to reality
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About
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History of comets
The designation of comets
Comets from Antiquity to the Middle Ages
The beginning of a scientific approach
Certainties and uncertainties in the 17th century
Newton and the comets
Halley’s, the first periodic comet
Hunting for comets
The forgotten story of female comet finders
New facts on the nature of comets
The spectrum of comets
Radioastronomy comes into the picture
Observations from space
Science of comets
What is a comet?
Comet tails
Where do comets come from?
Comets and shooting stars
Toward Halley’s comet
Close to Halley’s comet
Comets are falling on Jupiter
Closer to comets
Water and deuterium in comets
The incredible journey of the Rosetta probe
The instruments of Rosetta
The Philae lander
The nucleus of comet 67P/Churyumov-Gerasimenko
The chemical composition of comets
Comets around other stars
Comet hunters
Famous comets
Instruments
Gallery
Resources
Bibliography
Filmography
Chronology
Glossary
About comets
Comets and Art
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Glossaire beginning with Z
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Zenith
The vertical direction over a place. Its opposite is the
nadir
.