Untitled Flashcards Set

Defintions of Mare and Highlands–How do we recognize them? • Difference between Central Peak, Rilles and Mare lava flow? • How did we recognize which craters are older or younger?(maybe older ones are always under the younger ones, also vaguely bigger sizes are generally older craters! ) • Different Phases of the Moon! Possibly with the diagrams. • How do we define the Terminator line? Lab 5-The Sun and Solar Activites • Different layers of the Sun. • Difference between the Photosphere and Chromosphere? • Formation of Sunspots?(Due to high magnetic fields) What did we find the Sunspots cycle on the webpage? (approx–10yrs). • Some physical activities in the Sun—like Coronal Mass ejections, Solar Flares. • What can we say about the Corona temperature? why this is hotter than chromosphere? Because Magnetic loops drops its energy in coronal region. Lab 6-Parallax • Relationship between the Angular Size(θ) and Distance of the Object(D = S θradian ). • Conversion of θdegrees to θradian (θradian = θ ◦ 57.3 ◦ –Remember!!) • Calculation of Distances in parsecs and in Astronomical Units(AU)(DAU = 1 θRadians and Dpc = 1 θ 00 )-Remember!. • How much is one astronomical unit in km?(1AU = 1.5×108km also 1parsec = 3.26 light years). Lab 7- Brightness and The H-R Diagram • Difference between Apparent magnitude(m) and Absolute Magnitude(M). • How did we infer the brightness of the Star with the value of Absolute Magnitude?(More positive value of ’M’ means lesser the brightness of the star!) • Distance to any star is given as-> Dpc = 10| m−M 5 +1| (this is x y not x × y, do not get confuse!) • Energy calculation of the star.[Energy factor (E) = (2.512)Ma−Mb ]-Remember!!! • Relative size of any two star is given as- Ra Rb = p Energyf actor(E). • Significance of H-R diagram–like Brightness and Age of the Star. • Why Absolute Magnitude is preferred than apparent magnitude? Because Apparent Magnitude is locations dependent.