This challenge was a relatively simple one. It told you to use this link and then wanted you to find out which stars are represented by the following numbers.
21185, 1618, 753
If you zoom in to the collection of stars, you’ll be able to see the names of the stars followed by some numbers. The stars with the numbers above were:
- Lalande 21185
- Groombridge 1618
- HR 753
These stars may not be immediately visible, so you may need to zoom in closely and move around a little.
So the answer was LALANDE_GROOMBRIDGE_HR.