sinovels Chapter 38
Chapter 38
I used the key to open the door of the activity room and walked in. The room was dark, and my wife followed me. He turned on the flashlight on his mobile phone and found the light switch on the wall.
My wife flipped a switch and the lights in the room came on.He turned off the flashlight, put away his phone, and walked around looking at it with interest. xkswy
"Is this a picture they took with a telescope?" my wife asked, browsing the pictures on the wall.
I walked over, and what my wife was looking at was a photo of the moon. I turned over the back of the photo and saw a familiar signature: Xu Wen.
"This one was taken by my deskmate." As I said that, I turned back to the front of the photo and looked at it, "It always feels weird..."
My wife heard me talking to myself and leaned over to look at this photo with me. He smiled and asked me: "What do you think is strange?"
"Shouldn't the surface of the moon be full of potholes?" I exhausted all my astronomical knowledge and finally asked such a question, "But this photo doesn't look so many pits... some places are even smooth of……"
"It may be because the equipment here is limited, but the position of the celestial body at that time will also affect it." My wife smiled slightly, "Look, the photo shows the full moon. When the full moon is full, the sun, the earth and the moon In a straight line, the sun's rays shine directly on the moon, and the craters reflect the sun's rays, making these potholes difficult to see, so we seem to have a smooth surface on the moon."
"Oh! So that's how it is!" I seemed to understand it, but I didn't seem to understand it.
"And when the moon is full, the surrounding stars will be visible to the naked eye. It is difficult to observe with ordinary astronomical telescopes." My wife added.
"Wow, brother, you know a lot!" I never knew that my wife was so interested in astronomy. Maybe he was already busy when I joined the army, and he hardly had time to observe the starry sky.
"No," my wife shook her head with a smile. He was very humble and sincere, "I just have a superficial understanding of some popular science knowledge."
I know that my wife is a very humble person, she has always been open-minded to ask for advice, never complacent.I seemed to see the familiar figure in my memory.
We moved one of the telescopes, attached to a tripod, outside the house.
Today's moon is not overwhelming, and the stars in the night sky are very bright.
I adjusted the tripod to the proper height and I couldn't help with the rest.Originally, I wanted to go to the house to get the instruction manual, but then I thought that my wife might know how to operate it, so I gave my wife a look for help.
"Brother, can you adjust this telescope?" I winked at my wife and stepped aside.
My wife smiled and walked to the telescope, "I'll try."
"The telescope we moved out has an equatorial mount," my wife explained to me while adjusting it. "Just now I saw that the one in the house uses a longitude and latitude mount."
"What are equatorial mounts and longitude and latitude stations?" I really don't know anything about astronomy.
"It's the type of telescope mount." My wife pointed to the part at hand. It has a slender metal rod at the end. "The equatorial mount can be used to counteract the rotation of the earth."
"With the longitude and latitude station, you can adjust the telescope up, down, left, and right." My wife patiently explained to me, "If we use the longitude and latitude station to observe a certain star, due to the rotation of the earth, we will see it in the field of view after a while. We can’t reach this star anymore, so we need to constantly adjust the angle of the telescope artificially to track it.”
"I understand!" I replied excitedly, "So the equatorial mount is a device that can move in the opposite direction to the earth! The earth rotates from west to east, and the equatorial mount rotates from east to west. As long as the two move at the same speed, This offset can be offset!"
"Well, yes." My wife nodded with a smile. "What I need to do now is to adjust the position of the polar axis of the equatorial mount so that it is parallel to the rotation axis of the earth and points to the north celestial pole." There are those screws in it.
"North Celestial Pole...does it have something to do with Polaris?" I asked.
"You are very talented." My wife praised me with a smile, "However, Polaris is not always visible. At this time, you can choose bright stars close to the meridian, and give priority to those close to the celestial equator."
Just as I was about to ask a question, before I even opened my mouth, my wife said that she spoke first. He smiled and said, "Do you want to ask what the celestial equator is?"
I nodded.
"Then we need to understand the concept of the celestial sphere first," my wife smiled and explained, "The celestial sphere is actually an imaginary sphere in astronomy. It has the same center and rotation axis as the earth, and is a circle with an infinite radius." sphere."
"After the earth's equator extends infinitely and intersects with the celestial sphere, it is the celestial equator. The north and south poles on the earth are projected onto the celestial sphere, which are called the celestial poles. This is the star finder..." My wife pointed to the small one on the lens barrel. Telescope, he turned his head to look at me, and suddenly smiled, "Does it mean that if I continue talking, you will lose your head?"
"Woo, then I've become a master of the equatorial mount..." I used the knowledge I just learned tonight as an analogy.
"Hahahahahaha..." My wife laughed happily.He got up to make room for me, "It's been adjusted, you can come and have a look."
I walked over and bent down to look at the stars in the eyepiece, "Wow—"
Although the star in the field of vision does not look big, you can clearly see a ring around it,
"Guess what star it is?" My wife asked with a smile, "Hint: the sixth planet in the solar system from near to far."
This isn't a hint, it's already clearly stated!
"Saturn!!" I quickly replied.
"It's really smart." My wife said with a smile, "The most prominent feature of Saturn is the outer ring. Doesn't it look nice?"
I nodded.Although my wife is much more dazzling than the stars in my eyes, but if my wife says Saturn is beautiful, then Saturn is beautiful.
"The technical term is called planetary rings, which are made of matter that is gravitationally orbiting the planet." My wife explained to me, "Saturn's planetary rings are mainly composed of ice particles and a small amount of rocky dust."
"The diameter of Saturn is nine Earths." My wife said, looking down at me.
"Wow really?! But it looks so small..." I looked up at my wife.
"Actually, it's 830 times the diameter of the Earth," my wife smiled. "Its mass is equivalent to [-] Earths."
"Damn it, it's so big!" I said in shock, "It looks so small in the eyepiece..."
"Saturn is a gas giant, mainly composed of hydrogen and a small amount of helium." My wife explained to me with a smile.
"Wow, even such a light gas has such a massive mass," I exclaimed.
"It's not all gas, it's surrounded by liquid metal hydrogen." My wife said with a smile.
"The hydrogen has become liquid, so it must be very cold on Saturn!" A gust of evening wind blew from the rooftop, and I shrank and hugged my arms tightly.
"Yes." My wife echoed with a smile, "According to observations, astronomers believe that the temperature of Saturn is about minus 180 degrees Celsius."
"It's so cold!" The wind blowing on the roof almost made me feel the same.I stood up and stretched my muscles.
My wife looked at me, smiled, and he unzipped his jacket, then opened his arms to me, "Come here."
I froze for a second, then lowered my head and threw myself into my wife's arms, "Brother Wuwu, you are so warm!"
My wife smiled and wrapped her coat tightly around me, and pressed her face to my forehead.
I put my arms around my wife's waist, which is still so thin.I buried myself in my wife's arms, feeling his warm breath.
"Brother, do you think we can see shooting stars tonight?" I asked.
"Well... Logically speaking, it shouldn't be possible." My wife said with a smile, his voice came into my ears from the chest, adding a muffled depth to the gentleness.
"Then let's watch the stars next time when there is a meteor shower." I rubbed my wife's neck.
My wife tightened her arms and hugged me tighter, with a gentle smile in his voice, he replied: "Okay."