Units
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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Check
Across:
2.
It is the mean distance of the centre of the Sun from the centre of the Earth.
3.
Most of the stars visible to the ______ eye in the night sky are within 500 parsec distance from the sun.
4.
______ is the unit of distance used to measure astronomical objects outside the solar system.
Down:
1.
It is the distance travelled by light in one year in vacuum and it is equal to 9.46 ×10^15 m.
2.
We use submultiples of ten, to measure small distances. These quantities are measured in ___________ unit
OK