"This is Jupiter, Mrs. Ye." It was Mark, who was at work, who replied.

He Xiyan took a deep breath.

At this time, she admitted that she was shocked, she had not studied geography, and she had seen the photos of the eight planets of the solar system posted on the Internet, but this was the first time she had seen a celestial body under the lens of a telescope.

She could even see Jupiter slowly spinning, the atmosphere on its surface moving, and the huge cyclonic storm.

"Oh my God! Jupiter actually looks like this, and it doesn't look like the photos posted on the Internet at all. ”

He Xiyan let out a sigh, it was really spectacular, too incredible.

Ye Hao was standing beside He Xiyan, as he expected, she would really be excited and excited when she saw such a scene, the same as when he saw it for the first time, but the last time he came, he didn't see Jupiter, because the lens of the telescope was not aimed at Jupiter at that time.

"How big is Jupiter?" He Xiyan forgot the geographical knowledge he had learned, and only knew that Jupiter was the largest planet in the solar system.

"Jupiter's mass is 2.5 times the mass of the other planets in the solar system combined, 318 times the mass of the Earth, and its volume is 1,321 times that of the Earth, and Jupiter's radius is one-tenth of the radius of the Sun, and the mass is one-thousandth the mass of the Sun." It was Ye Hao who replied, and a faint smile appeared on the corner of his mouth.

As long as she is happy, he will take her wherever she wants.

He Xiyan turned his head to look at Ye Hao, "You are quite familiar with your back." ”

He Xiyan really didn't realize that Ye Hao was interested in astronomical observation before.

The observatory has state-of-the-art telescopes, including radio telescopes, as well as space telescopes, which can see objects more than 10 billion light-years away.

He Xiyan found that the screen next to him displayed beautiful clouds, colorful, lake blue, peach-red, dreamy, there were white, yellow, blue dotted stars in the clouds, these should be stars.

He Xiyan looked at this beautiful picture with wide eyes for a long time.

"Where is this?" He Xiyan asked Dr. Mark on the side.

It's incredible, the vast universe is so beautiful.

"This is the Trilopine Nebula, located in the constellation Sagittarius, near the center of the Milky Way, about 5,000 light-years away from our Earth."

"Five thousand light years?"

He Xiyan was stunned as if he was stupid, his eyes staring straight at the dreamy picture on the screen.

5,000 light-years she couldn't imagine how far away it was, she knew that the time for sunlight to reach the earth was 8 minutes, 5,000 light-years, what kind of concept was that......

"Yes, this nebula is mainly due to the fact that it has an open cluster (hundreds or thousands of stars composed of stars with weak gravitational connections) that attack the hydrogen atoms in the nebula with a powerful radiation move, causing them to lose their electrons, and when the electrons combine with protons, they will emit a brilliant light, so we can only see the beauty of this thing in the sky.

Mark explained. He speaks Chinese because he has lived in China for a long time. It's just that He Xiyan couldn't understand such a professional explanation.

He Xiyan only knew that there were beautiful nebulae on the screen, and those points of light were stars, many stars.

"Are stars born in nebulae?"

He Xiyan asked Mark on the side like a primary school student. When she was a child, she loved to look at the stars and think about strange questions.