Last Ewen Telescope Open House Tomorrow 4:30pm Lockhart Planetarium

Rosetta Update Philae Spectra: ESA/Philae Panorama. Rosetta Update Philae Spectra: Position of 1st bounce: H2O & rich in organics. Final position: H2O & low in organics. Main mission accomplished. Now in hibernation – in shadow of cliff - sunlight may be sufficient when closer to sun.

Rosetta Update Rosetta will orbit comet. Perihelion August 2015. ESA/Reddit user IG-64. Rosetta Update Rosetta will orbit comet. Perihelion August 2015.

Planet Hunting & Exo-biology Update: Artist’s Concept Imaging sun-like stars: without cool dust in outer regions, unlikely to have warm dust in inner regions. ½ stars are like this.  image around stars without cool dust rings Planets around M dwarfs HZ: Could have O but no life due to intense heat in formative years.  “mirage earths” didn’t use M stars in our estimate. http://www.keckobservatory.org/recent/entry/scientists_accurately_quantify_dust_around_planets_in_search_for_life http://www.washington.edu/news/2014/12/02/mirage-earth-exoplanets-may-have-burned-away-chances-for-life/

Meteorite from Mars – organic carbon? analogous to coal (biological in origin)? “Insisting on certainty is unwise, particularly on such a sensitive topic,” warns Gillet. “I’m completely open to the possibility that other studies might contradict our findings. However, our conclusions are such that they will rekindle the debate as to the possible existence of biological activity on Mars – at least in the past.” http://actu.epfl.ch/news/traces-of-possible-martian-biological-activity-ins/

Academic Learning Centre Tuesday Dec. 2: Preparing for Final Exams206 Tier, 11:30 – 12:45 This workshop will focus on how students can organize their materials and time so as to prepare effectively--and early--for final exams. http://umanitoba.ca/student/academiclearning/workshops/index.html

do all exercises mentioned in class review all images Tips: http://www.physics.umanitoba.ca/~english/2014fallphys1810/test.html do all exercises mentioned in class review all images do all relevant questions in Mastering Astronomy Selecting which are relevant is part of your learning.

Need to be able to do ratios of masses, timescales, convert units Exam Final Exam: * Tuesday Dec 9th @ 9am E2-229 EIT Complex* 2 hours 72 questions in 2 hours 9 math questions 11 B&W images – to remind you of colour images in ppt slides Need to be able to do ratios of masses, timescales, convert units Based on material from last test onward – everything AFTER Sun But includes previous material that is referred to in this section of the course. ALL NOTES COPYRIGHT JAYANNE ENGLISH

Exam Final Exam: * Tuesday Dec 9th @ 9am E2-229 EIT Complex* 2 hours • Allowed non-programmable calculators: Sharp EL-240SAB, Sharp EL-240SA, Sharp EL-240SB Sharp EL-510RNB, Sharp EL-510RN TI-30XZ TI-30X IIS Only Specified Calculators! Recall notice from Faculty of Science: could end up with F-DISC in the course. (Can do questions without calculator.) ALL NOTES COPYRIGHT JAYANNE ENGLISH

Practise (examples) Rsch Tips for exam Practise (examples) Rsch determining stellar radius given luminosity & temperature (e.g. compared to sun) determining distance using Inverse Square Brightness Law (e.g. compare to stars) Hubble Law lifetime on MS

Do this for a galaxy to determine its dynamical mass in Msun Tips for Exam: recall – used to measure mass in planet using orbiting moon Do this for a galaxy to determine its dynamical mass in Msun look up a galaxy online or in textbook (e.g. the Milky Way) find out orbital velocity do for 2 radii: radius of its 21 cm gas layer. radius of sun for MW remember to convert units! Dynamic: Physics of or relating to forces producing motion. In the solar system M is constant. In a spiral galaxy M is not constant. What does this mean that the mass is increasing?

Make up critical thinking questions: Try to make up ones that show your understanding. analyze evaluate apply

Morning class.

Afternoon class

That’s a lot of matter (dark and otherwise). All the best on the exam. Congratulations! You’ve covered the universe from the beginning of time until now (and a bit beyond). That’s a lot of matter (dark and otherwise). All the best on the exam. May you have clear skies for your future astronomy observations.