The Pith of Astronomy Without Mathematics the Latest Facts And Figures As Dev
The Pith of Astronomy Without Mathematics the Latest Facts And Figures As Dev
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The student of stars will in a short time begin to see that they have indi- vidual colors. Many of these are clear- ly marked, and the observer will at once notice their various tints. It is believed they take their colors from their chem- ical composition in a state of incandes- cence.
THE FIXED STARS 85 Aldebaran and Antares are red ; Be- telguese is orange ; Sirius, Vega, and Altair are bluish white; Arcturus, Capella, and Pollux are yellow; while others have tints of the r'uby> the emer- al...d, the topaz, and the sapphire.
There are many variable stars that is, stars which grow bright and then fade in a fixed period. Of this class Mira and Algol are the most remark- able. Mira attains the size of a sec- ond-magnitude star and remains in that condition 15 days; then it grad- ually fades and remains invisible for 5 months; afterwards it reappears and increases slowly, to again become brill- iant; the entire transformation occu- pies 331 days. Mira is sometimes called " the wonderful. " One of the accepted explanations of these changes is that it alternately 86 THE PITH OF ASTRONOMY burns fiercely and smoulders within the time of its period.
What to read after The Pith of Astronomy Without Mathematics the Latest Facts And Figures As Dev?
You can find similar books in the "Read Also" column, or choose other free books by Samuel G Samuel Gamble Bayne to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The student of stars will in a short time begin to see that they have indi- vidual colors. Many of these are clear- ly marked, and the observer will at once notice their various tints. It is believed they take their colors from their chem- ical composition in a state of incandes- cence.
THE FIXED STARS 85 Aldebaran and Antares are red ; Be- telguese is orange ; Sirius, Vega, and Altair are bluish white; Arcturus, Capella, and Pollux are yellow; while others have tints of the r'uby> the emer- al...d, the topaz, and the sapphire.
There are many variable stars that is, stars which grow bright and then fade in a fixed period. Of this class Mira and Algol are the most remark- able. Mira attains the size of a sec- ond-magnitude star and remains in that condition 15 days; then it grad- ually fades and remains invisible for 5 months; afterwards it reappears and increases slowly, to again become brill- iant; the entire transformation occu- pies 331 days. Mira is sometimes called " the wonderful. " One of the accepted explanations of these changes is that it alternately 86 THE PITH OF ASTRONOMY burns fiercely and smoulders within the time of its period.
What to read after The Pith of Astronomy Without Mathematics the Latest Facts And Figures As Dev?
You can find similar books in the "Read Also" column, or choose other free books by Samuel G Samuel Gamble Bayne to read onlineMoreLess
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