Save 23% on what we rate as one of the best telescopes out there. It features a 102mm aperture, a 1325mm focal length, a Maksutov-Cassegrain optical design, smartphone-controlled and it comes with ...

Save nearly $30 on a Celestron Travel Scope 70 telescope that features fully coated glass optics, a 70mm aperture, a 400mm focal length, correctly oriented views and a backpack for you to ...

Why? The most common reason is that magnification capability doesn’t match with the telescope’s objective size. In detail, it’s the objective focal length (FL or F). The bigger the objective size, the ...

San Diego just moved to preserve affordable housing. Here’s what it could do. The proposed preservation law aims to prevent thousands of rent-restricted apartments intended for low-income and ...

The denominator must not be 0 part-part problems - where the value of one part of the ratio is given and the value of another ratio part has to be found part-whole problems - where the value of ...

The basic materials sector is comprised of companies that produce raw materials, such as steel, aluminum, and crude oil. These companies are the backbones of the global economy: without them, we ...