* Telescopes don't see distances, they gather light. A telescope's power is measured by its light-gathering ability, not its ability to see far away.
* "Seeing" depends on the object's brightness. You can see a bright object like a nearby galaxy with a small telescope, but you might not be able to see a faint, distant galaxy.
* The universe is vast. There are objects billions of light-years away, and even powerful telescopes can't see everything.
What a 70mm telescope can do:
* Observe the Moon in detail: You'll see craters, mountains, and other features.
* See planets: You'll be able to see Jupiter's moons, Saturn's rings, and the phases of Venus.
* Explore brighter deep-sky objects: This includes some star clusters, nebulae, and brighter galaxies.
How to think about telescope power:
* Aperture: The larger the diameter of the telescope's primary mirror or lens (like your 70mm), the more light it gathers, which means you can see fainter objects.
* Magnification: This is determined by the eyepiece you use. Higher magnification lets you see more detail, but it also makes the image dimmer.
In conclusion:
Instead of focusing on a specific distance, consider what objects you want to observe and choose a telescope with the appropriate aperture. A 70mm telescope is a great starting point for stargazing and offers a fantastic view of many celestial objects!