What are the top ten astronomical wonders in the world?

Rocket smoke traces at sunset. The afterglow of the setting sun and the dim halo of the newly emerged moon add color to this photo of rocket smoke traces twisting and fluttering in the night sky. This digital image taken to the west was taken at the Table Mountain Observatory in California, USA, on September 19, 2002. At the time of filming, the Minuteman III left a smoke mark. Solid-fuel rockets have gone very far. The rocket, launched from Vandenberg Airforce Base, will carry a test payload across thousands of kilometers of the Pacific Ocean. The setting sun that day gave the smoke marks a red/orange color, and even rendered the top of the smoke marks bright white. The full moon that had just risen from the east gave the bottom of the smoke marks under the sunset line a layer of pale white. color. The diffuse cloud at the top of the smoke mark is caused by the separation of the rocket thrusters. The water vapor in this part of the smoke instantly forms ice crystals in the cold high altitude. Because it is still bathed in the daylight, a lot of ice crystals are produced. Tiny rainbow. Meteors and Auroras Stargazers reported that in the early morning hours of August 12 and 13, the Perseid meteor shower appeared as predicted, with a meteor every few minutes. On the night of August 11, as the constellation Perseus rose above the horizon, astrophotographer Wade Clark was waiting to take photos of meteors passing through the sky at the Mount Baker Ski Resort in northern Washington State, USA, but at the same time, he was lucky. Saw a beautiful Northern Lights show. So when taking pictures, he placed the stars in the constellation Perseus in the center of the starry field above, so that the meteors originating from the constellation Perseus would pass through the beautiful aurora. In 2000, the Sun, which was in its active period at the time, staged the same beauty in conjunction with the Perseid meteor shower. Moonrise in Seattle Does the moon look bigger when it's near the horizon? The answer is no. As the photo above shows, the moon is almost the same size no matter where it is in the sky. The cause of this common moon hallucination is still a source of debate. The two most common explanations suggest that the illusion originated because foreground objects made the moon near the horizon appear farther away. The older and most widely accepted theory is that the human brain interprets distant objects as larger, while the newer theory further explains that the illusion of distance causes the human eye to produce a focus difference. Regardless, the moon's diameter is actually about 0.5 degrees. The time-series image above was taken at the end of last year. The moon is briefly exposed every 2.5 minutes, and the last exposure is longer to bring out the beautiful panorama of Seattle. Comet and Aurora over Alaska Can you point out the comet in the image above? The cold skies over Alaska show clear and colorful auroras. Just on the lower left, there is an inconspicuous celestial body standing out on the background: Comet Ikeya-Zhang, the brightest comet in recent years. The comet is now appearing in Before sunrise, the brightness in the east remains barely visible to the naked eye. The comet is actually a giant dust-covered snowball that has spent most of its life traveling in the outer solar system and is now returning to where it came from. The photo below was taken on March 20, during the time of Comet Iketani-Zhang when reaching maximum brightness. The new moon embraces the old moon. This picture shows a phenomenon commonly known as "the new moon embraces the old moon". The faintly visible dark gray light in the embrace of the new moon is actually the sunlight emitted by the earth and reflected on the moon. The light coming back. This image was taken by astrophotographer Laurent Laveder from the Pic du Midi Observatory. Aurora in the Yukon Territory of Canada On September 28 and 29, 2001, two coronal mass ejections occurred on the surface of the sun. At the same time, waves of high-energy particles rushed towards the earth, triggering aurora activity. A week later, the flapping sheet of magnetic fields separating the southern and northern hemispheres of the sun happened to pass by the Earth, causing another wave of aurora activity. Stars not in galaxies Galaxies are made up of stars, but are all stars in galaxies? Not so. Using the Hubble Telescope, scientists studying the Virgo Cluster found about 600 red giant stars. Floating in the vast intergalactic space. An artist's rendering of the sky as it might be seen from a planet around such a lonely sun, where the night sky looks completely different from Earth's, which is filled with stars - members of our own galaxy - and where the setting red Sun What's left is almost no stars in the sky, just an assortment of faint, fuzzy galaxies that are members of the Virgo Cluster. This lone Sun was likely ejected from a galaxy-to-galaxy collision long ago. The secret of the black aurora Black aurora refers to the dark band between the normal bright aurora, which is often recorded in aurora images. But few people have raised questions about its cause. Recently, scientists used data provided by four stars in Earth orbit called "Cluster" to conduct research and solve the mystery of the black aurora.

Normal aurora is the glow caused by electrons or negatively charged particles rushing towards the earth's atmosphere along the earth's magnetic field, hitting the earth's atmospheric molecules and ionizing them. The black reverse aurora is the negatively charged particles in the earth's ionosphere. , a phenomenon caused by being sucked out from the gaps between the earth's magnetic field lines. This dark anti-aurora extends to an altitude of up to 20,000 kilometers and sometimes lasts for several minutes. In this image taken in Fairbanks, Alaska, USA, you can clearly see a black aurora between the normal bright aurora. Starlight on Mount Kilimanjaro On a moonless night, it is also when the stars are clearest. Dan Heller, who took this scene, camped on the 4,800-meter-high Mount Kilimanjaro (Mt. Kilimanjaro) in Africa and spent the time A three-and-a-half-hour exposure was used to capture this view. In this photo, except for the weak lights in the tent and the green city lights in the distance, most of the brightness of the landscape comes from starlight. This scene faces north, placing Polaris close to the horizon and on the far left of the photo, trailing starlight Draw beautiful concentric arcs. The Sombrero Galaxy M104 looks like a hat. It is facing us sideways. In addition to the many bright stars in the center, there is also an eye-catching dark band running through the center of the galaxy disk. Billions of old stars make the diffuse bulge in the center of the galaxy appear very large. Careful analysis can reveal that many of the bright spots are actually globular star clusters. M104's magnificent dust rings contain many young, bright stars. Some recent studies suggest that there may be a supermassive black hole at the core of the galaxy.

The Sombrero Galaxy is 50 million years away from us and can be seen with a small astronomical telescope. If you like it, please accept it, thank you

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