Four degrees northwest of it is the third-magnitude star Gomeisa.
A standard first-magnitude star is 2½ times brighter than a standard second magnitude star, etc.
A line drawn from γ to β Corvi and prolonged twice its length locates the third-magnitude star ι Centauri in the right shoulder of the Centaur.
Such of them as we can see at all with the naked eye are most of the time much brighter than any first-magnitude star.
It would require fourteen hours for light to pass from the sun to a planet at that distance, and the sun would appear to it smaller than Saturn or an ordinary first-magnitude star does to us.
Neptune is about equal to an eighth-magnitude star in brightness, and can never be seen without the aid of a telescope.
This star is called Hamal, and, while not a first-magnitude star, is a rather bright one of the second magnitude; and the triangle itself is very distinctly marked.
A third-magnitude star is on the average twice as far away as one of the first magnitude, a fifth-magnitude star four times as far off, etc.
Turn the glass upon beta (Rigel), the white first-magnitude star in Orion's left foot.
When seen low in the twilight, at evening or morning, it glows with the brilliance of a bright first-magnitude star, and is a beautiful object, though few casual watchers of the stars ever catch sight of it.
From these telltale plates it was ascertained that in 1894 it had been in perihelion very near the earth, and had shone with the brilliance of a seventh-magnitude star.
About four degrees northwest of Procyon is a third-magnitude star, called Gomelza, and the glass will show you two small stars which make a right-angled triangle with it, the nearer one being remarkable for its ruddy color.
Yet Regulus, although ranked as a first-magnitude star, and of great repute among the ancient astrologers, is far inferior in brilliancy to such stars as Capella and Arcturus, to say nothing of Sirius.
The ordinary 6th magnitude staris one which can be clearly seen by average sight on a good night, and it gives us about one-hundredth the light of an average 1st magnitude star.
Sirius, the brightest of all the fixed stars, is called a 1st magnitude star, but is really some six or seven times as bright as the average.
In exceptional cases the nucleus will become as bright as a 2nd or even 1st magnitude star, and the tail may acquire a length of several or many degrees.
Galle called out the visible stars one by one whilst D'Arrest checked them by the map, and suddenly he came upon an unmarked object which at the moment looked like an 8th magnitude star.
On September 17, the head equalled in brightness a 2nd magnitude star, the tail being 4 deg.
These are the stars we should all be able to recognize and call by name and in every instance the name of a first-magnitude star is given on the diagram.
A first-magnitude star is, then, one hundred times brighter than a sixth magnitude star which is the faintest star that can be seen without the aid of the telescope.
Sometimes it has been a very bright second-magnitude star when at its brightest, at others it has barely exceeded the third magnitude.
If he fixed the date only by the star's appearance as a second-magnitude star, his letter proves nothing; for we know that on the 13th it was still shining as brightly as Alphecca, though on the 14th it was perceptibly fainter.
Paul Henry estimated the star's brightness on December 2 as equal only to that of a fifth-magnitude star.
It soon began to decline after its appearance; in March 1605 it had shrunk to the dimensions of a third-magnitude star, and in a year later it became entirely lost to view.
At the distance of Sirius (fifty billions of miles) the Sun would shrink to the dimensions of a third-magnitude star, and the light of seventy such stars would be required to equal in appearance the brilliant radiance of the great dog-star.
Perhaps the whole mass of the cluster does not exceed that of an average first-magnitude star.
The star 70 Ophiuchi, a fourth-magnitude star on the right shoulder of Ophiuchus, is a noted double.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "magnitude star" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
