First Book in Astronomy ...Gould, Kendall, and Lincoln, 1838 - 120 Seiten |
Häufige Begriffe und Wortgruppen
aphelion Aries artificial globes Astronomy atmosphere attraction Aurora Borealis axis called celestial bodies celestial globe Ceres circle circumference comets constellation containing dark density diameter diurnal motion divided earth east eccentric orbit ecliptic electricity ellipsis equal equator equinoctial figure fixed stars force gravitation half heavenly bodies heavens hemisphere Hence Herschel horizon illustrated Juno Jupiter leap-year LESSON Libra light and heat longitude luminous lunar Mars Mercury meridian millions of miles minutes month moon moon's motion move round naked eye night north latitude northern observed opposite orbit orrery Pallas parallax passing Plate pole primary planets quadrant quantity of matter rays of light refraction repre represented revolution revolve round right angle right ascension ring rise round the sun satellites Saturn season seen sidereal day signs solar system sometimes sphere sun enters sun's supposed surface telescope tides tion tropical tude twilight velocity Venus Vesta zodiac
Beliebte Passagen
Seite 28 - Goat, which delights in climbing and ascending some mountain or precipice, is the emblem of the winter solstice, when the sun begins to ascend from the southern tropic, and gradually to increase in height for the ensuing half year. Aquarius...
Seite 24 - Hence it follows that when we see an object at the calculated distance, at which one of these very remote nebulse may still be perceived, the rays of light which convey its image to the eye, must have been more than nineteen hundred and ten thousand, that is, almost two millions of years on their way ; and that, consequently, so many years ago,' this object must already have had an existence in the sidereal heavens, in order to send out those rays by which . we now perceive it.
Seite 59 - By his skill in astronomy he knew that there was shortly to be a total eclipse of the moon. He assembled all the principal persons of the district around him on the day before it happened, and, after reproaching them for their fickleness in withdrawing their affection and assistance from men whom they had lately revered, he told them, that the Spaniards were servants of the Great Spirit who dwells in heaven, who made and governs the world; that...
Seite 28 - The whole heavens appeared as if illuminated with sky rockets, which disappeared only by the light of the sun after daybreak. The meteors, which at any one instant of time appeared as numerous as the stars, flew in all possible directions, except from the earth, towards which they all inclined more or less ; and some of them descended perpendicularly...
Seite 29 - ... grand and awful. The whole heavens appeared as if illuminated with sky-rockets, which disappeared only by the light of the sun after daybreak. The meteors, which at any one instant of time appeared as numerous as the stars, flew in all possible directions, except from the earth...
Seite 50 - But, with respect to the sun, as the earth advances almost a degree eastward in its orbit, in the same time that it turns eastward round its axis, it must make more than a complete rotation before it can come into the same position again with the sun which it had the day before.
Seite 65 - ... together with the clouds and vapours that float in it, is called the atmosphere. The height to which the atmosphere extends has never been ascertained ; but at a greater height than forty-five miles it ceases to reflect the rays of light from the sun.
Seite 24 - Hence it follows that the rays of light of the remotest nebulce must have been almost two millions of years on their way, and that consequently, so many years ago, this object must already have had an existence in the sidereal heaven, in order to send out those rays by which we now perceive it.
Seite 93 - For I perceived that, if light was propagated in time, the apparent place of a fixed object would not be the same when the eye is at rest, as when it is moving in any other direction than that of the line passing through the eye and...
Seite 63 - The earth revolves on its axis in about twenty-four hours : if the moon were stationary, therefore, the same part of our globe would, every twenty-four hours, return beneath the moon; but as, during our daily revolution, the moon advances in her orbit, the earth must make more than a complete rotation in order to bring the same meridian opposite the moon, we are three...