Q: How does the Oberth Effect work, and where does the extra energy come from?  Why is it better for a rocket to fire at the lowest point in its orbit? | Ask a Mathematician / Ask a Physicist

Physicist: When a rocket fires it increases its speed by some fixed amount called the “ΔV” (delta V). If the original speed is W, and the rocket speeds up by ΔV, then the change in ene…

Gravity is such a constant it's easy to forget how much it shapes our experience. Randall Munroe, creator of the webcomic XKCD took this as a challenge. With a straightforward illustration, he compares the relative “depth” of various solar system gravity wells. Each well is drawn in such a way that it represents the relative amount of energy it would take to escape from that planet or celestial body's gravitational pull.

Gravity Wells infographic, courtesy of Randall Munroe's brilliant science webcomic XKCD.

The Oberth Effect  - Kerbal Science (KSP)

This episode demonstrates and explains 'The Oberth Effect' and the extra efficiencies you can gain from doing some of your burns at the highest possible velo.

Delta-v budget - Wikipedia, the free encyclopedia - Delta-v needed for various orbital manoeuvers using conventional rockets.[7] See:[10][11] Red arrows show where optional aerobraking can be performed in that particular direction, black numbers give delta-v in km/s that apply in either direction. Lower-delta-v transfers than shown can often be achieved, but involve rare transfer windows or take significantly longer, see: fuzzy orbital transfers. Electric propulsion vehicles going from Mars…

A diagram showing the stair-step energy needed to travel to places beyond the Earth. Delta-V is the velocity in km/sec to reach a destination. The Delta-Vs a accumulative. (Credit: Wikipedia, Delta-V)

Colonias espaciales

In the NASA scientists studied the possibilities of building giant space colonies. See how colossal space communities would work.

How Do Rockets Work? - Reactions - YouTube

This week's Reactions video makes first contact with the kerbalnauts! Through the fun of Kerbal Space Program, they examine the chemistry of rockets, looking at solid and liquid propellants and the “ride-able explosion” that is a rocket launch.

Kerbal Space Program Truth

and I can't get KerbTown and Kerbin City because those cause my game to lag to arse.

Kerbal Space Program | Video tutorials suggested by the KSP website

This episode will cover the absolute basics of rocket building in Kerbal Space Program. We will explore the Kerbal Space Center and the Vehicle Assembly Buil.

Assassin's Creed III

Assassin's Creed III Assassin's Creed III

Brand: UbisoftEdition: StandardESRBAge Rating: MatureFeatures: As a Native American assassin, eliminate your enemies with guns, bows, tomahawks, and more!

I noticed that too...

Doesn't it feel like Trump denied climate change and then the climate was like, hold my beer.

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That’s no moon… it’s a fire pit. Grandpa Welds a Death Star Fire Pit for Christmas.