เทพศิรินทร์ สป แบบทดสอบก่อนและหลังเรียน เรื่อง การบอกตำแหน่งวัตถุท้องฟ้า

The answer is "มุมที่เริ่มวัดจากทิศเหนือมาตามเส้นขอบฟ้าทางทิศตะวันออกจนถึงจุดตัดของเส้น
ขอบฟ้ากับเส้นดิ่งที่ลากผ่านวัตถุนั้น". This is because the question is asking for the definition of "มุมอาซิมุท" and this answer describes the angle that is measured starting from the north and following the eastern direction until it reaches the point where the sky edge intersects with the vertical line passing through the observed object.

The answer choice states that the line is drawn along the edge of a semicircle until it intersects and forms a right angle with the horizon. This explanation accurately describes the term "เส้นขอบฟ้า" in the given context.

The question asks for the definition of "มุมเงย" (vertical angle). The correct answer states that it refers to the angle formed by the straight line drawn from the observer to the object in the sky and the straight line drawn from the observer to the point of intersection between the sky's horizon and the vertical line passing through the object in the sky.

The given answer states that star A has an azimuth angle of 130 degrees and an elevation angle of 60 degrees, while star B has an azimuth angle of 210 degrees and an elevation angle of 60 degrees. This information matches the given values in the question and is consistent with the provided data.

The observer in Thailand is located at a latitude of 60o north, which means they are in the northern hemisphere. The observer in Thailand sees Mars at an azimuth angle of 90o and an elevation angle of 45o. Based on this information, we can determine that Mars is located in the southern part of the sky. Since the question asks for the specific region, the correct answer is "ด้านตะวันออกเฉียงใต้" which translates to "southeast" in English.