Who has never seen in movies and series people watching the planets and stars through a telescope?
They are impressive and dazzling images of the universe. But make no mistake, in real life this is not the case. Not even the telescope space Hubble is able to obtain such admirable landscapes.
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Such images are produced from long photographic exposures in which the same area of space is recorded for hours, days and even months, producing several scenes that are then added up, or as they say in astronomical parlance, “stacked up”.
There are basically three types of telescope the refractor, the reflector and the catadioptric. The best will depend on your observation objective and experience.
You reflecting telescopes work from the reflection of light by mirrors. It works in such a way that the light coming from the stars is reflected by a concave mirror called the primary, then reflected by another smaller mirror – the secondary and then goes to the eyepiece.
O telescoperefractor, as the name implies, works with refraction so that light passes through a lens to form an image. Due to the presence of an objective lens it is possible to capture the light of the objects and form the image in focus.
You catadioptric telescopes use both lenses and mirrors.
The truth is that there is no telescope that is considered the best. It all depends on your goal. Larger or smaller telescopes can vary their viewing power depending on the details.
A simple 50 millimeter refractor telescope already allows the visualization of stars of 9 magnitudes. In addition, they allow observations of sunspots and their faculae (luminous material observed in the vicinity of the sunspot).
For this, the instrument must be equipped with a filter or solar observation screen.
Along with this, there is the possibility of distinguishing double stars with a separation of 5 seconds and contemplating some clusters such as the Pleiades, Hyades and also the Orion nebula M42.
Another interesting point is the observation of Jupiter in its details. You can see the polar flattening of the planet and easily see its four main satellites.
Venus, on the other hand, allows the study of its phases and, pointing the lens towards Saturn, it is possible to perceive its rings, but in a tiny way. Mars is a small ball, almost without definition.
While a telescope with a 300 mm reflector allows observations of the satellites of Uranus and Triton (satellite of Neptune). Being possible to unfold systems of 0.4 seconds of arc.
Its large size allows objects of 14 magnitudes to be seen. It is, without a doubt, a dream of lovers of the astronomy. However, it will not be possible to observe Pluto. That's because the dwarf planet has a brightness of only 15.1 magnitudes.
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