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Lab Exercises in Astronomy: The Crab Nebula

By The Editors of Sky & Telescope

Format: Supplies

SKU# LE008

Students will take on an in-depth investigation of the beautiful Crab Nebula, learning its history before calculating the nebula's age, expansion, and distance.

Owen Gingerich begins this five-page, fully illustrated exercise with a historical overview of observations of the Crab Nebula. Then, on large-scale photographs taken 34 years apart, proper motions of knots and filaments are measured to find its rate of expansion across the sky. Radial velocities (line-of-sight motions) of the filaments are obtained from a high-dispersion spectrogram showing red and blueshifted lines. The combined measurements yield the nebula’s size and distance, as well as the year the expansion began.

SKU LE008
Author The Editors of Sky & Telescope
Format Supplies
$1.65

In Stock

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