How big is ماهی زرین R?
410,000,000 קילומטרים!
ماهی زرین R تقریبا بزرگ است و تنها 233 سال نوری از زمین فاصله دارد، بنابراین اندازه ی ظاهری آن از لحاظ بزرگی دومین در آسمان است! پهنای آن 3.32 ثانیه ی قوسی است. خورشید بزرگترین است با 1,920 ثانیه ی قوسی پهنا – 40,000 بار بزرگتر
دنب
دنب درخشان ترین ستاره در صورت فلکی ماکیان است. دنب در فاصله ی 1,500 سال نوری است، که آن را در رده ی 22 ستاره ی درخشان بسیار دور قرار می دهد. اگر بر روی مریخ زندگی می کردید، دنب باای قطب شمال قرار می گرفت – نه ستاره ی قطبی.
Enif
Enif is an orange supergiant. Its name means "nose" in Arabic, because in the constellation Pegasus, it is in the position of the muzzle. Coincidentally, the word "Enif" backwards is "Fine".
Distance from Earth to the Sun
During the day, the Sun doesn't seem so far away. It's actually about 150 million kilometers away. That distance is an astronomical unit, which is called an AU for short.
Pistol Star
The Pistol Star is one of the most luminous stars known. In twenty seconds, it radiates as much energy as the Sun does in a year. Interstellar dust prevents us from seeing it. It's called the Pistol Star not because of its luminosity, but because it's in the Pistol Nebula.
S Doradus
S Doradus is a hypergiant, as well as one of the brightest stars in the Large Magellanic Cloud. For more about the Large Magellanic Cloud, zoom out 8.5 orders of magnitude.
La Superba
La Superba is one of the reddest stars in the night sky. It is so red because of all the carbon-13 it creates when fusing helium. (Normal carbon is carbon-12.) La Superba is only 2700° C, making it one of the coldest stars.