Why are there so many famous observatories in the Southern Hemisphere?

The southern hemisphere is relatively inhabited by humans, and there are many observation gaps in the southern hemisphere celestial region, and the newly established observatories in the southern hemisphere have achieved many remarkable scientific results.

This is because the observation conditions in the southern hemisphere are better than those in the northern hemisphere.

The terrain of the southern hemisphere is more suitable for the construction of observatories.

The topography and weather in the Southern Hemisphere make it easier to observe celestial phenomena.

Observation conditions in the southern hemisphere are relatively good.

There are many observation gaps in the southern hemisphere region

It is more beneficial and clearer for observation.

The southern hemisphere is also open and easy to observe.

The newly established observatories in the southern hemisphere have achieved many remarkable scientific results.

It is supposed that the Greenwich Observatory is located on the prime meridian, that is, the zero degree of the meridian passes through it, so the distinction between the eastern and western hemispheres is problematic.

In order to solve this problem, the dividing line between the eastern and western hemispheres was moved to 20 degrees west longitude and 160 degrees east longitude, and most of them passed through the ocean, so it caused the least trouble (and the setting of the international date line).

The Greenwich Observatory is at 0 degrees, so it belongs to the Western Hemisphere.

In London, England, and certainly in the Northern Hemisphere.

I guess your teacher is asking whether the Greenwich Observatory belongs to the Eastern Hemisphere or the Western Hemisphere. That is in the Eastern Hemisphere, its longitude is 0°, and it is internationally stipulated that the dividing line between the Eastern and Western Hemispheres is a circle surrounded by 20°W longitude and 160°E longitude, and the east of 20°W longitude is the Eastern Hemisphere, and the west is the Western Hemisphere, so the Greenwich Observatory is in the Eastern Hemisphere.

See it again in detail.

You are wrong, all of Europe is in the Northern Hemisphere, and the Greenwich Observatory is crossed by the 0° meridian, which is the dividing line between east and west longitude, but it is in the Eastern Hemisphere, because from 20°W to 160°E is the Eastern Hemisphere.

Greenwich Observatory in the United Kingdom. The United Kingdom is located north of the equator. So, the Greenwich Observatory is in the Northern Hemisphere.

The Northern Hemisphere, as if in the United Kingdom.

Greenwich Observatory in London.

It is advisable to check the map and find out which hemisphere London is in.

Nanjing Purple Mountain Observatory, Xinglong Observatory of the National Astronomical Observatories of the Chinese Academy of Sciences, Phoenix Mountain Observatory of Kunming, Yunnan Province, Nanshan Base of Xinjiang Astronomical Observatory, Sheshan Observatory of Shanghai Astronomical Observatory.

Greenwich Observatory, UK: This is a very famous observatory all over the world, but now this observatory is more symbolic and scientific, and the zero line of the world's longitude (prime meridian) is located at this observatory.

Wilson Observatory in the United States: There are only meters and meters diameter astronomical telescopes, but it is in this observatory that the famous astronomer Hubble discovered Hubble's law through observation, and understood the basic form of the universe and the observational evidence of the grand theory of the universe.

Mount Paloma Observatory, USA: A 5-meter diameter reflecting telescope is installed.

Anglo-Australian Observatory: The meter astronomical telescope is installed.

Kitt Peak and Serra Torolo Observatory; A 4-meter diameter astronomical telescope is mounted.

CFHTY: Meter-diameter astronomical telescope installed.

Special Physical Observatory of Soviet Russia: equipped with a 6-meter diameter astronomical telescope.

European Southern Observatory: Equipped with a new technology astronomical telescope with a meter diameter.

Hubble Space Telescope: Equipped with a meter-diameter astronomical telescope. Since the telescope is launched into space by satellite, the observation is very undisturbed, and a large number of unprecedented space galaxies** have been photographed, making a great contribution to mankind's understanding of the universe.

The larger observatories in China are:

Nanjing Purple Mountain Observatory: In addition to the observatory on the Purple Mountain in Nanjing, there are also six field observation stations, with a 1m diameter astronomical telescope and a meter millimeter wave radio telescope. The station mainly conducts research on cosmic dark matter and debris in the universe.

Beijing Astronomical Observatory: In addition to the headquarters in Zhongguancun, Beijing, there are also five field observation stations. There are meter and meter astronomical telescopes and radio telescopes, which are mainly engaged in the study of stellar evolution, solar activity and satellite tracking.

The National Astronomical Observatories of China reports daily solar activity, including sunspots and flares, and makes short-term sunspot and flare forecasts.

Yunnan Astronomical Observatory: located in Kunming. There is a 1-meter meter astronomical telescope. His research interests include stellar evolution, high-energy astrophysics, and solar spectroscopy. It also undertakes the task of receiving ground data for the national lunar exploration project.

Shanghai Astronomical Observatory: Mainly engaged in the research of astronomy, geodynamics and galactic cosmology. There are 25-meter radio telescopes and meter-meter astronomical telescopes.

In April 1990, the United States put a caliber meter? The 11,600-kilogram Hubble telescope was put into orbit at an altitude of 680 kilometers, a program that cost $1.5 billion and took 15 years? Before that, nearly 100 different types of astronomical satellites had been launched into the sky?

There are hundreds of large and small observatories on the earth, so why spend so much money to launch a "space observatory"?

Perhaps you've had the experience of preparing for a solar eclipse for months, only to be disappointed by a rainy day? If you can fly above the clouds, you won't be "bullied" by bad weather? And that's the first advantage of space telescopes?

There is a beautiful Southern Cross constellation in the southern sky, but you can't see it north of the Yangtze River in our country? And in many places in the southern hemisphere, we can't see the familiar Big Dipper? Astronomical satellites orbit the earth, "survey the sky and see a thousand rivers from afar", and can see the stars of the whole day at the same time, which is the advantage of the ground observatory?

On the ground, even if the weather is clear, the stars in the telescope will still flutter and blur because of the thick atmosphere that ripples like the sea? Outside the atmosphere, the stars will not flicker, and the same telescope will see stars several times clearer than on the ground? Moreover, there is no atmospheric scattered light in space, the background of the starry sky is always dark, and astronomical observations can be made 24 hours a day?

Of particular importance is the response of the atmosphere to infrared light? Ultraviolet light? X-rays and rays have a strong attraction, so many astronomical satellites go into space to observe these invisible rays of light, and make many important discoveries?