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 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.

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

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

The Oberth Effect  - Kerbal Science (KSP)

The Oberth Effect - Kerbal Science (KSP)

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…

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…

Adventures in (Radio) Amateur Astronomy - Technology Org

Adventures in (Radio) Amateur Astronomy - Technology Org

Milchstraße als U-Bahnnetz Poster - 24h Lieferung | getDigital

Milchstraße als U-Bahnnetz Poster - 24h Lieferung | getDigital

If Our Universe Is So Old and Vast, Then Where Are All the Aliens? - Imgur

If Our Universe Is So Old and Vast, Then Where Are All the Aliens? - Imgur

Stop for a moment and ponder just how amazing it is that Sperm Whales dive as deep as they do and we all live on a tiny shell covering the planet.  And we think we are so important...

Stop for a moment and ponder just how amazing it is that Sperm Whales dive as deep as they do and we all live on a tiny shell covering the planet. And we think we are so important...

'Hello, Ghostbusters?' 'ooOOoooo people born years after that movie came out are having a second chiiiild right now ooOoooOoo'

'Hello, Ghostbusters?' 'ooOOoooo people born years after that movie came out are having a second chiiiild right now ooOoooOoo'

The Evolution of the Geek.  I'm a Pop Culture Geek (but I'm offended that under Book Geek Twilight is lumped w/ HP, Narnia, & LotR)

The Evolution of the Geek. I'm a Pop Culture Geek (but I'm offended that under Book Geek Twilight is lumped w/ HP, Narnia, & LotR)

If other planets were in the place of the moon.

If planets were in the place of the moon…

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