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There are 3 lessons in this physics tutorial covering Astronomical Measurements and Observations. The tutorial starts with an introduction to Astronomical Measurements and Observations and is then followed with a list of the separate lessons, the tutorial is designed to be read in order but you can skip to a specific lesson or return to recover a specific physics lesson as required to build your physics knowledge of Astronomical Measurements and Observations. you can access all the lessons from this tutorial below.
In this Physics tutorial, you will learn:
So far, we have learned that distances in the Universe measured in light years vary from a few seconds or minutes (the distance Earth-Moon = 1.28 s of light, the distance Earth-Sun = 6 min 20 s of light, etc.) to billions of light years (in remote galaxies). However, a quick look at the sky provides little insight into which star is closer to us and which is farther. This is because stars have different sizes - a feature that can deceive our perception. The sky appears as a two-dimensional picture where the dimension of depth is missing. Hence, the measurement of distances in the sky has always been a challenging task for astronomers. Fortunately, in more modern times we have access to a significant number of tools and methods to support measurement, methods that depend on the distance of celestial bodies from Earth and which we will discuss and explain in this tutorial.
Sometimes, it is helpful to make observations for long periods in specific sections of the sky to know how the universe changes over time. This will be another element we are going to discuss in this tutorial.
Please select a specific "Astronomical Measurements and Observations" lesson from the table below, review the video tutorial, print the revision notes or use the practice question to improve your knowledge of this physics topic.
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