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Equinox 2 Telescope M101 M57 M27 Range of Exposure Times

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2024 April 8th Total Solar Eclipses - Internet Resources

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M101 Pinwheel Galaxy Supernova - Dwarf II Telescope

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Gravity Balance Position for Sun and Planets, Earth and Moon

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Geo-Synchronous Orbit Sizes for some planets and our Moon

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Phobos and Deimos-Elapsed Time Between Successive Meridian Passes for Observer on Mars

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Phobos and Deimos-Orbit Times for Moons of Mars-Rise at Which Horizon

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Fermi Problem - Total Number of Vehicles on the USA Interstate Highway System

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Projectile Motion-Object Falls and is Pushed Horizontally-Find Velocity at Impact on the Ground

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Model Rocket-Speed-Height-Physics Example Problem

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Kinematics-Two Cars Side By Side-One Has Constant Speed-One Accelerates

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Kinematics-Two Cars Traveling in same Direction-One Has Higher Speed

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Fermi Question-Weight of Garbage Thrown Out in One Year by a Family of Four-USA

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Eight Examples of Conversion of Units-English and Metric Systems-Definition of an Inch

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Importance of Education

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Why Leap Year - Gregorian Calendar - Seasons

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Groundhog Day-May Day-Lammas Day-All Saints Day-Cross-Quarter Day

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2021 Astronomy Events - List of Some Astronomy Related Events

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Jupiter Saturn Conjunction 2020 Summary of Measurements

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Jupiter Saturn Conjunction 2020 My Photos and Measurements Nov to Dec

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Jupiter Saturn Conjunction-Why 20 Years Between Successive Conjunctions

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Jupiter Saturn 2020 Conjunction My Photos-Angle Measurements

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Jupiter Saturn Conjunction December 2020 Video 1

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Asteroid Bennu

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OSIRIS-REx Mission to Bennu

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2020 Astronomy Events List

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Pluto, After New Horizons Flyby

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Water Bottle Fountain on Airplane

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Kinematics, Minimum Length of Runway for Plane Taking Off Into Wind and With Wind

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Kinematics, Airplane Takeoff Acceleration and Runway Length

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Apollo Lunar Lander (LEM) Acceleration, Throttle Control

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Apollo Saturn V Launch Acceleration, Kinematics

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M1 Crab Nebula Supernova Remnant

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Messier Catalog,, History and Survey of Objects

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Globular Clusters, Characteristics, How They Are Used By Astronomers

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Doppler Shift For Sound Reflected From Moving Car

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Distance to Storm from Thunder Time Delay

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Decibel Value When Distance To Source Changes

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Calculate the Intensity When dB (Decibel) Value is Given

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Roller Coaster With Friction Conservation of Energy

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Mass of Pluto From Charon Orbit Data

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Saturn's Rings, Periods of Inner and Outer Particles

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Location Where Forces of Gravity From Earth and Moon Balance

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Period of Apollo Spacecraft Around the Moon

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Time For Object To Fall To The Sun From 1 A.U. and Speed At The Sun

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Location Where Forces of Gravity From Sun and Earth Balance

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Does Our Moon Orbit The Sun or Does It Orbit the Earth??

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Earth Satellite With Period of 12 Hours Find Orbit Distance

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Large Elliptical Galaxies, Hubble Photos, Characteristics, Formation Theories

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Supermassive Black Holes in Galaxies, Detection, Correlation to Galaxy Mass

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Back EMF, Current and Power in a Motor

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Velocity Selector, Charge to Mass Ratio for Electron

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Speed of Sound and Air Temperature From Air Column Measurements

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Volume Expansion for Gasoline in Gas Tank of Car

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Frequency for Standing Wave on a String and Harmonic

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Pendulum Clock on Earth and Moon, Time Error

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Pendulum Clock, Length Increases, Determine Error in Time

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Determine Force Constant and Mass Attached to Spring

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Spring Cut In Half, New Force Constant

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Archimedes Principle, Density of Irregular Object