Astronomy Ranking Task: Stellar Evolution Exercise #2 Description: The figure below shows an H-R diagram with...
Astronomy Ranking Task: Star Evolution & Lookback Time Exercise #1 Description: Imagine that the four stars listed below all became Main Sequence (MS) stars at exactly the same time 10 billion years ago but in different locations of the universe. Cosmo Star is an O spectral class star with a MS lifetime of 3 million years. Its life will eventually end as a SN type II and become a black hole. Cosmo Star is located in a galaxy 10 billion...
Astronomy Ranking Task: Doppler Shift Exercise #4 Description: An important line in the absorption spectrum of stars occurs at a wavelength of 656nm for stars at rest. Imagine that you study five stars (A-E) from Earth and discover that this absorption line is observed at the wavelength shown in the table below for each of the five stars. STAR Observed Wavelength of Absorption line A 650 nm B 663 nm C 656 nm D 657 nm E 646 nm...
Astronomy ranking task phase of the moon Astronomy Ranking Task: Phases of the Moon Exercise #2 Description: The figure below shows a "top view" of the Sun, Earth and six different positions (A - F) of the Moon during one orbit around Earth. Note that the distances shown for the Sun to Earth and for Earth to the Moon are not drawn to scale Orbit of Moon OD Sunlight SUN NOT TO SCALE Ranking Instructions: Rank (from greatest to least)...