learn.howToCalculate
learn.whatIsHeading
Distance ladder uses successive methods to measure cosmic distances: parallax (nearby), Cepheids (galaxies), supernovae (clusters), Hubble (universe).
단계별 가이드
- 1Measure parallax for nearby stars
- 2Use Cepheid variables to calibrate nearby galaxies
- 3Extend to distant supernovae
- 4Apply Hubble law to universe
풀어진 예시
입력
Distant galaxy
결과
Distance 100 Mpc using multi-rung method
Each rung calibrates next
피해야 할 일반적인 실수
- ✕Neglecting rung calibration errors (accumulate)
- ✕Using inconsistent Hubble constant
자주 묻는 질문
Why not direct measurement?
Angular sizes too small; need successive calibrations.
계산할 준비가 되셨나요? 무료 Cosmic Distance Ladder 계산기를 사용해 보세요
직접 시도해 보세요 →