Astro ArenaIOAA
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Astro ArenaOBSERVING TASKS
IOAA
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IOAA · STAR-CHART PRACTICE

Missing stars

YOUR PRACTICE ON THIS DEVICE—

Customise the task

The range applies to added or missing stars. Lower magnitudes mean brighter stars. Apply the settings with the button or start a new random task.

Chart display

Click or tap the chart. Keyboard: arrow keys move the crosshair, Enter marks a position. Shift + arrows for precise movement.