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Sky on the Ledger

Did the sky lesson stick?

Ten questions that mix the XRP Ledger with the sky memo itself. Tap an answer and you will get the explanation right away. No grades, no pressure.

The lesson The challenge The quiz Open Live Sky

Sky quiz

Ten questions.

If you want a refresher first, skim the Sky on the Ledger lesson. You can also open the example transaction in another tab.

1. What kind of transaction does Live Sky use to save a sky snapshot?

2. Which memo type holds the actual sky data?

3. In the sky memo, what does t= mean?

4. In the sky memo, what does ml= mean?

5. What unit are the planet values in, like Su=13866?

6. Why is there a second memo, astrobear/sky-sha256?

7. What happens to the tiny XRP fee on this snapshot transaction?

8. The example snapshot in the lesson was saved on which network?

9. What is a ledger index?

10. Should birth dates or birth times go into a ledger memo?

Lesson Back to the lesson Read the annotated example, including the memo format and the hash check. Open the lesson Challenge Full Moon Snapshot Challenge Save a testnet snapshot near the November 24 full moon and share your explorer link. Read the rules