secpar   (TTS Sound)

The secpar has 1 Senses.

• secpar, parsec
• パーセク
• a unit of astronomical length based on the distance from Earth at which stellar parallax is 1 second of arc; equivalent to 3.262 light years
• 恒星視差が秒角である地球から距離に基づく天文学的な長さの単位