Mintaka hr diagram brightness and temperature

The Sun's apparent magnitude changes according to the inverse square law, therefore, the difference in magnitude as a result of greater or lesser distances from different celestial bodies can be

predicted by the following formula: ∝ Where "distance" can be in km, au, or any other appropriate unit. To illustrate, since Pluto is 40 au away from the Sun on average, it follows that the

parent Rigel (/ ˈ r aɪ dʒ əl, -ɡ əl /), also designated β Orionis (Latinized to Beta Orionis, abbreviated Beta Ori, β Ori), is a variable star.It is, on average, the seventh-brightest star in the night sky and the brightest star in the constellation of Orion—though occasionally it is outshone within the constellation by

Betelgeuse, another variable star.The apparent magnitude of Rigel astronomy picture of the day dated archive listing وهي التي يعبر عنها بمقياس كلفن ، وتستخدم للتعبير عن درجة حرارة الجسم بالاعتماد على الصفر المطلق الذي يساوي (273.2) درجة مئوية تحت الصفر, وهي عبارة عن الفرق بين درجة تجمد الماء في المقياس المطلق وهي 273,2 درجة كلفن، ودرجة

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