What is the study of the universe?
Physical cosmology is the branch of physics and astrophysics that deals with the study of the physical origins and evolution of the Universe. It also includes the study of the nature of the Universe on a large scale. In its earliest form, it was what is now known as "celestial mechanics", the study of the heavens.
By studying other galaxies, astronomers learn more about the Milky Way, the galaxy that contains our solar system. help astronomers learn about the history of the universe. Galaxies are visible to vast distances, and trace the structure of the visible universe with their collections of billions of stars, gas, and dust.
- The curve changes noticeably about 7.5 billion years ago, when objects in the universe began flying apart as a faster rate. Astronomers theorize that the faster expansion rate is due to a mysterious, dark force that is pulling galaxies apart. One explanation for dark energy is that it is a property of space.
- Salary Overview. In 2011, astronomers averaged $101,630 a year, according to the Bureau of Labor Statistics. But high salaries can sometimes skew the average, and median wage is often a better indication of an astronomer's earnings. Half of all astronomers earned less than $95,500 a year.
- To measure distances in the universe, we will need to construct what is commonly referred to as a "cosmic distance ladder". In other words, astronomers use different methods to determine the distances to objects; the specific method which is used depends on how far away the object is.
A wealth of examples show how the study of astronomy contributes to technology, economy and society by constantly pushing for instruments, processes and software that are beyond our current capabilities. In this essay we outline both the tangible and intangible reasons that astronomy is an important part of society.
- Astrology can help life because it shows I can't experience anything that doesn't belong to me. It also resolves the apparent conflict between determination and responsibility, because birth is the beginning of following a certain path. To follow is responsible living. To follow the path is called determination.
- At its first meeting in 1922, the International Astronomical Union (IAU), astronomy's governing body which is responsible, among other things, for assigning names to celestial objects and features on those objects, officially adopted the list of 88 constellations that we use today.
- About a third of the astronomers work for the government or government-supported institutions (e.g., NASA, National Optical Astronomy Observatories, National Radio Astronomy Observatories, U.S. Naval Observatory, Space Telescope Science Institute, etc.).
Updated: 2nd October 2019