ซ่อมเสริม เรื่อง กล้องโทรทรรศน์

ดูคลิปการใช้ชีวิตในอวกาศ แล้วตอบคำถามต่อไปนี้
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question
    This is a required question