SN 2005gj

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/sn-2005gj

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. What is the supernova type?Type Ia
2. What is the host galaxy?NGC 1264
3. Why do scientists call Type Ia supernovae "standard candles"?Because they shine with almost the same peak brightness each time. This lets astronomers measure how far away they are. It helps map the universe’s expansion.
4. How did SN 2005gj help scientists learn about dark energy?By measuring its brightness and distance, scientists added a point to the Hubble diagram. This helped confirm that the universe’s expansion is speeding up, a clue to dark energy. Each bright supernova adds more accuracy.

Chandrasekhar Limit: The maximum mass a stable white dwarf star can have before collapsing.
Thermonuclear Fusion: A nuclear reaction where atomic nuclei combine to form heavier nuclei, releasing energy.
Hubble Diagram: A plot showing the relationship between a galaxy's distance and its recessional velocity.
Dark Energy: A hypothetical form of energy believed to be driving the accelerated expansion of the universe.