Water on Mars
The Importance of Water on Mars
Water makes life possible:
in the past
In the present and future
Has there been standing water on the Martian surface?
How long did it exist for and when?
Where did it go?
The Drake Equation
Number of communicative civilizations in our galaxy
Mean rate at which suitable stars are born
Fraction of stars with planetary systems
Number of 'Goldilocks worlds per planetary system
Fraction of those planets wher
Comet 67P/Churyumov-Gerasimenko as photographed
by Rosettas OSIRIS camera from a distance of 285 km
Ph. 02 42214798
Each chemical element produces its own spectral lines.
Kirchoffs spectral l
Optics and Telescopes
Mauna Kea - Hawaii
Siding Springs Observatory at Coonabarabran NSW
We need to observe
1) The faintest possible sources
2) To pinpoint the direction of sources accurately
3) To be
Exo Solar Planets
The Solar System
Three Key Properties of our Solar
1. Size and composition of terrestrial
versus Jovian planets
2. Geometry of the planets orbits (orbit
the sun in the same direction and
3. Size of the terrestrial versus Jo
The Threat of Impacts
Major impacts have occurred on the inner planets, including
the Earth, and on the icy moons of the outer planets.
The questions arise:
What bodies have produced these impacts?
When did most of the craters occur?
How frequent do maj
Astronomy-Concepts of the Modern Universe
MID -SESSION TRIAL EXAMINATION 2014
Useful Information on Last Page
Page 1 of 7
NOTE: NON_SCIENCE STUDENTS ARE NOT REQUIRED TO DO CALCULATIONS
PART I (Multichoice Questions) Answer all questions. C
EM radiation emitted when heating object.
Info can be found about the object from the amount of light emitted when
Ability to emit radiation is directly proportional to ability to absorb
When temp of body exceeds surroundings, emits more than abso
Silver Coin Galaxy
The Silver Coin Galaxy is a famous and photogenic galaxy, also known as
Sculptor Galaxy and NGC 253. It is 11.5 million light years away from the
Milky Way lying halfway between the star Beta Ceti and the star Alpha
Sculptoris and it al