Hurtling through a cosmic dust cloud a mere 400 light-years away, the Pleiades or Seven Sisters star cluster is well-known for its striking blue reflection nebulae.

• 它们之前只相隔了400光年的宇宙尘埃，众所周知，昴宿星团或七姐妹星团中含后众多的蓝色反射星云。