The ESA/ESO Exercise Series booklets English - Exercise 7

In this exercise we measure the period and apparent magnitudes of Cepheid variables in the galaxy M100 on FITS images with the free European Hands-On Universe software SalsaJ. The absolute magnitude is derived using the Period-Luminosity relation and the distance to M100 can then be determined using the distance relation. Finally we calculate a value for the Hubble constant (using a value for the recession velocity of M100 observed by other scientists) and estimate the age of the Universe. English Version. LASER PRINT. Full-colour.


ESA/Hubble & ESO

About the Material

Buy in shop
Release date:19 March 2012, 17:07
Dimensions:21 cm (W) x 29.7 cm (H)

More details about this product:
See the ESO Shop Catalogue.


Large JPEG
1.8 MB
Screensize JPEG
358.7 KB


PDF File
30.4 MB
PDF File
1.2 MB

Also see our