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Khám Phá Thang Độ Sáng Sao Từng Bước
The Stellar Magnitude Scale Explorer starts as soon as the page loads: drag to orbit, scroll to zoom, and toggle Apparent vs Absolute mag. Everything renders on your own device - no install, no account.
Step 1 - apparent mode
Start in Apparent mag so Sun, Sirius, Vega, and the naked-eye limit size from Earth-sky magnitudes.
Step 2 - absolute mode
Press Absolute mag and watch the Sun shrink to its about +4.83 absolute rank at 10 pc.
Step 3 - focus buttons
Press Sun, Sirius, Vega, and Naked-eye limit, then fullscreen to keep controls visible while you compare soft flux sizes.