IAU designated constellations

High school (ages 12+)
Space & Astronomy

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/iau-designated-constellations

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. Who wrote IAU designated constellations?International Astronomical Union (IAU)
2. What is the total number of IAU designated constellations?88
3. What is the year of official boundary definition?1930

Celestial Sphere: An imaginary sphere of infinite radius concentric to the Earth, onto which all celestial objects are projected.
Right Ascension (RA): The celestial equivalent of longitude, measured eastward along the celestial equator from the vernal equinox.
Declination (Dec): The celestial equivalent of latitude, measured in degrees north or south of the celestial equator.
Ptolemy's Almagest: An ancient astronomical treatise that cataloged 48 constellations and provided a geocentric model of the universe.