Virtual Observatory & HORIZON project H. Wozniak 1, and HORIZON 2 consortium 1 CRAL 2 CEA/SAp, CRAL, IAP, LERMA, LUTH.
CH 15: Stars, Galaxies, and the Universe
AST 5.1 PPT
Star Properties. Apparent Magnitude System of Hipparchus Group of brightest stars1 m Stars about ½ as bright as 1 m 2 m Stars about ½ as bright as 2 m.
Measuring Distance and Size of Stars Physics 113 Goderya Chapter(s): 9 Learning Outcomes:
cas. Magnitude Absolute vs. Apparent 2 The analogy Imagine a birthday candle and a spotlight are both 50 feet in front of you – Which would be brighter?
II-2b. Magnitude 2015 (Main Ref.: Lecture notes; FK Sec.17-3) b 1 / d 2 Lec 2.
Summary of Astronomy Test 1 Review Kepler’s Laws Test 1 Review Spectra –Continuous –Absorption –Continuous Test 1 Review Compute distance to a star using.
Slide 1 The Family of Stars Chapter 9. Slide 2 Part 1: measuring and classifying the stars What we can measure directly: – Surface temperature and color.
Slide 1 M31: The Andromeda Galaxy 2 million light years from us
Photometry. Measuring Energy Photometry measures the energy from a source using a narrow range of wavelengths. –Visual wavelengths from 400-700 nm –Narrower.
Once we know the surface brightness profile of a galaxy, we can integrate it from 0 to to the total integrated apparent magnitude of a galaxy in a given.
