Recently, on the forums and websites of overseas astronomical astronomy, there has been a trend of comparing photos taken by amateurs with works taken by the Hubble space telescope. Of course, for the most part – if not all of the selfies were never "available" when compared to the world's leading scientific telescope like the Hubble Space Telescope, but this trend is somewhat speaks of the popularity, development potential as well as the increasing importance of amateur astronomical photography in the general development of astronomy around the world.
I would also like to send you some photos taken from the private observatory on the roof of my house in the suburbs of Hanoi. Along with that will be the image taken from the Hubble Space Telescope so that you can enjoy and compare.
The famous picture "Pillars of Creation" (Pillars of Creation) was taken by the Hubble space telescope in 2014, left. These dense pillars of dust are located at the center of the Eagle Nebula, the area circled on the right image. The photo on the right is taken from a 700mm focal telescope at its observatory in 2017. The Eagle Nebula is about 7,000 years from the light towards the constellation of the Snake. The color difference in the two photos mainly comes from the nature of the types of filters used in the recording process and later image processing techniques.
See also: Astronomical image sensor and color processing in astronomical images
The Horsehead nebula is collected at the infrared spectrum by the Hubble space telescope located on the left. This nebula is located in a giant nebula complex that spreads over the winter sky, facing the Orion constellation. The image on the right collected at the visible spectrum by two telescopes at its observatory, showing that the Head Horse nebula is a dark color object in the center of the image, highlighted on the red background of the nebula IC 434. behind. The Horsehead Nebula is about 1500 light-years away.
Sharp details on the halo and dust disk of the Sombrero galaxy captured by the Hubble Space Telescope above. The wide field image at the bottom is captured by a 1.6-meter focal reflecting telescope at your observatory. The estimated distance between the Sombrero galaxy and us is 33 million light-years.
The dust disk of the Helix Nebula is synthesized from the data captured by the Hubble Space Telescope in conjunction with the United States Kitt Peak National Observatory in the image above. The picture below is a wide field shot from a system of two refractive telescopes at your observatory. The Helix Nebula is a good example of a planetary nebula that forms at the end of evolution from our medium and small mass stars like our Sun. In this process, the outer half of the star will be ejected into space to create the nebula. The glowing core remaining in the middle is called the planetary nebula nucleus or white dwarf star. The Helix Nebula is about 700 light-years away from the constellation Aquarius.
My amateur observatory was built on the roof of a private house in the outskirts of Hanoi since 2017. The total investment cost so far falls to around 600-700 million, including a complete station according to roll- design. off roof, three telescopes, two video cameras, one dynamic Japanese pillar, three computer platforms and other auxiliary systems. The station has done hundreds of hours of observation and exposure, mainly directed at planets in the solar system, nebulae, star clusters and other large galaxies. To be able to photograph the night sky in light pollution conditions in the suburban area of Hanoi, the cameras are equipped with some narrow-band filters to isolate and clearly identify each of the wavelength components of emission elements in the nebula's heart, minimizing excess light coming from sources on the ground. Of course, there are still some photographs taken in the visible range with the RGB spectrum completely coinciding with the color perception of the human eye. Most of these photos were recorded in very clear weather conditions, when astronomers climbed to avoid light pollution from the horizon.
See also: See the best pictures taken from amateur astronomical station in Hanoi
The Hubble Space Telescope (Hubble Space Telescope) is a joint project of the US Space and Aeronautics Agency NASA and the European Aerospace Agency ESA in the 80-90s of the last century. The glass is equipped with a 2.4-meter diameter reflector with a filter system, high resolution camera and a variety of other scientific measuring devices. This space telescope operates at 610 km above the ground, which is hardly affected by the turbulence of the Earth's right atmosphere. At the time of the launch in orbit in April 1990, the estimated budget for it fell to about US $ 1.5 billion (approximately US $ 2.9 billion at 2017 prices).
Over 5 times of repairing, replacing and supplementing components by shuttle missions, Hubble Space Telescope has been operating for over 29 years and brought about many great discoveries. Great on the universe, a big part in proving the pillar theory, the foundation of modern astronomy. According to NASA, the total funding for the Hubble Space Telescope has reached approximately $ 11 billion (more than VND 250 trillion at current exchange rates), including the costs of research and manufacturing, launching funds. the mission, the maintenance, maintenance and operation missions every year.