This brief review compares the performance on planetary visual/astrophotography of a pair of 6 inch (150mm) of aperture telescopes.

The footage above corresponds to a Jupiter as seen through a Sky-Watcher 150mm f/8 Achromat Refractor OTA. It shows better contrast but a clear secondary spectrum.

The footage below is Jupiter seen through a 150mm 6″ F5 Newtonian telescope. It delivers lower contrast but it lacks of any chromatic aberration.

Music by myself, in order to avoid copyright problems.

Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the acceleration vector (a(t)=dv(t)/dt) given the general equation of the position vector v(t)=Rcos(t)i+Rsin(t)j. Acceleration vector, a(t), is also know as the centripetal acceleration as it represents the change in the direction of the velocity vector (not the change in the magnitude).…

Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! ðŸ™‚ https://www.patreon.com/patrickjmt !! Using Double Angle Identities to Solve Equations, Example 1. In this video, I use some double angle identities for sine and/or cosine to solve some equations. Great fun!! For more free math videos, visit…

Part V: Multiple Integration, Lecture 2: The Fundamental Theorem Instructor: Herbert Gross View the complete course: http://ocw.mit.edu/RES18-007F11 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu

This video is part 1 of a 2-part series on Absolute Value Inequalities. Here we focus on understanding what absolute value inequality is and look at a few simple examples. This is part of my Algebra Unit 2 Lesson 8. To view this unit click the link below: https://www.teacherspayteachers.com/Product/Algebra-Equations-Inequalities-Lesson-Notes-Homework-Quiz-Test-3842506