In addition, turbulent motion in the atmosphere blurs the light travelling through it, causing objects to twinkle and appear fuzzy. Another problem with ground-based telescopes is that they are
subject to local weather conditions
, and high clouds can ruin the chance of making any useful observations.
What is the main drawback of earth based optical telescope?
Can receive only visible light/ radiation
.
Cloud over in Earth’s atmosphere can be a barrier
.
City lights put limitations
.
What are 2 disadvantages for space based telescopes?
Disadvantages.
Space telescopes are much more expensive to build than ground-based telescopes
. Due to their location, space telescopes are also extremely difficult to maintain. The Hubble Space Telescope was serviced by the Space Shuttle, but most space telescopes cannot be serviced at all.
What are some limitations of telescopes?
- Very high initial cost relative to reflector.
- A certain amount of secondary spectrum (chromatic aberration) unavoidable (reflector completely free of this) The colours cannot focus at one point.
- Long focal ratios can mean that the instrument is cumbersome.
What is the most important factor to consider when purchasing a telescope?
The most important aspect of any telescope is
its aperture
, the diameter of its main optical component, which can be either a lens or a mirror. A scope’s aperture determines both its light-gathering ability (how bright the image appears) and its resolving power (how sharp the image appears).
What are the advantages and disadvantages of ground-based astronomy?
Compared to space-based telescopes, ground-based telescopes have much to offer.
They can be built bigger and for less money
. They’re easier to maintain and upgrade. Practically speaking, they also have a much lower risk of being damaged by one of the 500,000 pieces of debris flying through the cosmos—or space junk.
What are the difficulties in using ground based optical telescope how are they overcome?
Answer: The difficulties faced in using ground based telescopes due to which it does not make good quality observations are:
Intensity of light rays reaching the Earth’s surface decreases as some of the light is absorbed by the atmosphere
.
Why do we put telescopes in orbit?
Telescopes are placed into orbit around the Earth or are
sent farther out into space to get a clearer view of the Universe
. There are many different types of space telescopes. Some are used to study a special object like the Sun. Others are used to study the different types of light given off by objects in space.
Where are ground telescopes best located?
For optical telescopes, most ground-based observatories are located far from major centers of population, to avoid the effects of light pollution. The ideal locations for modern observatories are
sites that have dark skies
, a large percentage of clear nights per year, dry air, and are at high elevations.
What are 2 problems with refracting telescopes?
The two problems with refracting telescopes are
a chromatic aberration and spherical aberration
.
What are some limitations of Newtonian reflecting telescopes?
Disadvantages of the Newtonian design
Newtonians, like other reflecting telescope designs using parabolic mirrors, suffer from coma,
an off-axis aberration which causes imagery to flare inward and towards the optical axis
(stars towards edge of the field of view take on a “comet-like” shape).
Which of the following is the biggest disadvantage of putting a telescope in space?
Which of the following is the biggest disadvantage of putting a telescope in space?
Space telescopes are much more expensive than similar ground-based telescopes.
Is 70mm telescope good?
However, a 70 mm refractor (which collects 36% more light than a 60mm telescope) is considered by many amateur astronomers to be the minimum size for a
good quality beginner refractor
telescope. It is acceptable for observing bright objects like lunar details, planets, star clusters, and bright double stars.
What is the most powerful telescope for home use?
- Celestron CGX-L Equatorial 1400 Telescope Bundle.
- Celestron CGX-L Equatorial 1400 EdgeHD Telescope Bundle.
- Meade LX200 14-inch Telescope Bundle.
- Celestron 14-inch OTA.
- Celestron 14-inch EdgeHD OTA.
- Meade LX850 16-inch f/8 OTA.
How do you know if a telescope is good?
The key spec for any telescope is
its aperture, or the diameter of its lens or mirror
. The bigger the better because a bigger aperture can collect more light and distant objects appear brighter. But this comes at a price, and bigger telescopes are also much less portable.
Are telescopes bad for the environment?
Another concern is the telescope’s potential impact on wildlife. … But in the past, telescope development has
restricted the habitat
of the Wekiu bug, contributing to its being listed as a candidate for an endangered species until 2011.
