西面有个星星
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突突，你看到的应该是Venus
If the western horizon is really clear, you might be able to see Mercury, the closest planet to the Sun, where the daytime temperatures are enough to melt lead and tin. Higher up the sky you will see Venus, the second planet out from the Sun, shining like a white searchlight. Your telescope will show Venus as a white crescent, lit from one side by the Sun. You're not seeing the surface of the planet; you're looking at the top of a thick layer of clouds. We can only see Venus' surface by radar, or by physically landing there. Since the temperature is high enough to melt lead and the pressure of the planet's unbreathable atmosphere is ninety times the pressure at sea level on Earth, it's unlikely people will be landing there very soon.
Further up, eastwards, you'll see the Pleiades, or "Seven Sisters." That reddish, starlike object nearby is Mars, the fourth planet from the Sun (our planet is the third). It's certainly nothing like as bright as it was in the summer of 2003. That red star to the left of Mars, is Aldebaran. Notice that the star is twinkling, whereas the planet is not. Now that Mars is approaching the opposite side of the Sun from us, you will need a large telescope and excellent observing conditions to see much. However you should be able to see the red colour of the Martian deserts. Mars has a very thin atmosphere, and although one might get a summer day as warm as 20 degrees C, it will get to 100 or more below zero that night. However, we can handle that; Mars is a place we can visit, and someday even live there.
High in the southern sky you will see two more or less equally bright stars, quite close together. These are Castor and Pollux, the brightest stars in the constellation of Gemini, "The Twins." Now scan very roughly towards Venus, and you will come to a moderately bright, golden object. This is the planet Saturn, the sixth planet from the Sun. As soon as you point your telescope at Saturn you will see that it looks different. The planet itself is a tan-coloured ball with belts of cloud. However what strikes one immediately is that it is surrounded by a system of concentric rings. Those rings, which are made out of ice and rock fragments, make Saturn the most beautiful object in the Solar System, with the exception of the planet we're living on.
You won't need a map for the next step. In the eastern sky is another planet, just a bit fainter than Venus. This one is Jupiter, orbiting between Mars and Saturn. Your telescope will show another tan-coloured disc with conspicuous coloured belts. Both Saturn and Jupiter are members of the class of planets called "gas giants," because they are mostly made of gas. Your telescope will show Jupiter's four brightest moons: Io, Europa, Ganymede and Callisto. You will be able to see them changing position from night to night.
If the western horizon is really clear, you might be able to see Mercury, the closest planet to the Sun, where the daytime temperatures are enough to melt lead and tin. Higher up the sky you will see Venus, the second planet out from the Sun, shining like a white searchlight. Your telescope will show Venus as a white crescent, lit from one side by the Sun. You're not seeing the surface of the planet; you're looking at the top of a thick layer of clouds. We can only see Venus' surface by radar, or by physically landing there. Since the temperature is high enough to melt lead and the pressure of the planet's unbreathable atmosphere is ninety times the pressure at sea level on Earth, it's unlikely people will be landing there very soon.
Further up, eastwards, you'll see the Pleiades, or "Seven Sisters." That reddish, starlike object nearby is Mars, the fourth planet from the Sun (our planet is the third). It's certainly nothing like as bright as it was in the summer of 2003. That red star to the left of Mars, is Aldebaran. Notice that the star is twinkling, whereas the planet is not. Now that Mars is approaching the opposite side of the Sun from us, you will need a large telescope and excellent observing conditions to see much. However you should be able to see the red colour of the Martian deserts. Mars has a very thin atmosphere, and although one might get a summer day as warm as 20 degrees C, it will get to 100 or more below zero that night. However, we can handle that; Mars is a place we can visit, and someday even live there.
High in the southern sky you will see two more or less equally bright stars, quite close together. These are Castor and Pollux, the brightest stars in the constellation of Gemini, "The Twins." Now scan very roughly towards Venus, and you will come to a moderately bright, golden object. This is the planet Saturn, the sixth planet from the Sun. As soon as you point your telescope at Saturn you will see that it looks different. The planet itself is a tan-coloured ball with belts of cloud. However what strikes one immediately is that it is surrounded by a system of concentric rings. Those rings, which are made out of ice and rock fragments, make Saturn the most beautiful object in the Solar System, with the exception of the planet we're living on.
You won't need a map for the next step. In the eastern sky is another planet, just a bit fainter than Venus. This one is Jupiter, orbiting between Mars and Saturn. Your telescope will show another tan-coloured disc with conspicuous coloured belts. Both Saturn and Jupiter are members of the class of planets called "gas giants," because they are mostly made of gas. Your telescope will show Jupiter's four brightest moons: Io, Europa, Ganymede and Callisto. You will be able to see them changing position from night to night.
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TT看见了维纳斯:love::love:
