It's largely a matter of features and construction.
Basically, the Zhumell uses a "camera tripod", which uses a "joystick" for aiming the scope. It's very "handy", but... it tends to "shift" the aim, a bit, when you "lock it down". It works ok, but... there are no "granular" adjustments, in any axis, so "tracking" a moving "object" (eg. the stars, etc) can be challenging.
By comparison, the Celestron uses separate declination (eg. up/down) and azumith (left/right) controls, and the declination does have a "granular" adjustment. So, as with the "joystick", it works ok, but, again, "tracking" a moving "object" (eg. the stars, etc) can be challenging.
An "equatorial mount" allows "granular" adjustments in both axises. It's a bit more expensive, and it's quite "precise", but... it's a bit of a "pain" to get it all set up and adjusted.
I've had both; I still have the Zhumell Zenith.
If you are not used to telescopes you will find a refractor easier to use than a reflector.
A telescope collects electromagnetic radiation to view objects far away. A telescope is a device used to observe remote objects and used in the study of astronomy. The first telescope was made in the 1600's..
because it can
Galileo !
Mounts vary in complexity. A simple mount has the purpose of holding the telescope steady. Fancier mounts can have built in motor drives and even computers to find and track stars as they move across the sky.
The Dobsonian telescope was designed with a large objective diameter to observe very faint deep sky objects. It was originally designed from readily available components to provide a large yet still portable low-cost option for telescope users.
A telescope collects electromagnetic radiation to view objects far away. A telescope is a device used to observe remote objects and used in the study of astronomy. The first telescope was made in the 1600's..
because it can
The Hubble Space Telescope it used to take pictures of distant objects in space.
Galileo !
To see if rockopper is coming.
He built the telescope because he saw his children play with lenses and he got the idea of making it
Launched on April 24th 1990 the purpose of the Hubble space telescope is so astronauts and astronomers and even the public can discover new images of our Galaxy and other Galaxy's and other planets
The telescope's purpose is for scientists to be able to look into space and see what stars are made of and what the cycle of stars is. Some telescopes are public and anyone can look through them. But others are only for scientists. The telescope was invented by Galileo Galilei. You can see his finger in his very own museum! :0)
Magnify images
Gathering and focusing light from distant objects.
Mounts vary in complexity. A simple mount has the purpose of holding the telescope steady. Fancier mounts can have built in motor drives and even computers to find and track stars as they move across the sky.
The NIRC-2 feature of the Keck telescope in Hawaii is used for that purpose, though i don't think it is the only one.