Timeline of Solar System astronomy

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/timeline-of-solar-system-astronomy

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 discovered Timeline of Solar System astronomy?By William Herschel in 1781, expanding the known planetary system
2. What is the galileo's key observations?Moons of Jupiter and phases of Venus, providing evidence for heliocentrism
3. What is the space age initiation?Marked by the launch of Sputnik in 1957, enabling robotic exploration

Heliocentrism: The astronomical model in which the planets revolve around the Sun.
Epicycle: A small circle whose center moves around the circumference of a larger circle, used in ancient astronomical models.
Spectroscopy: The study of the interaction between matter and electromagnetic radiation, used to determine chemical composition.
In-Situ Analysis: Scientific investigation conducted directly at a location, rather than remotely.