query: A planet with a straight tunnel through it
positive_passages.docid: 90503
positive_passages.text: Period of oscillation through a hole in the earth
negative_passages.docid: 89194
negative_passages.text: Potential at Center of Earth
negative_passages.docid: 132722
negative_passages.text: Why was this item left relatively unguarded on a barren planet?
negative_passages.docid: 60025
negative_passages.text: How far can something travel in a straight line?
negative_passages.docid: 127988
negative_passages.text: modeling a world made of cubes
negative_passages.docid: 112532
negative_passages.text: Short story about a hole to another universe that pulls in metal
negative_passages.docid: 99935
negative_passages.text: Finding the unique rock with its weight
negative_passages.docid: 47968
negative_passages.text: Thought Experiment - Poking a stick across a Black Hole's Event Horizon
negative_passages.docid: 152476
negative_passages.text: Unique Perpendicular Geodesic
negative_passages.docid: 154012
negative_passages.text: A simple curve of positive area
negative_passages.docid: 49151
negative_passages.text: Could there be a dark matter planet?
negative_passages.docid: 22873
negative_passages.text: Integrating radial free fall in Newtonian gravity
negative_passages.docid: 22106
negative_passages.text: Prove that time for planet to fall into the Sun equals $\left( \frac { 1 }{ 4\sqrt { 2 } } \right)$ of the planet's period
negative_passages.docid: 141584
negative_passages.text: Planetary/Atmospheric volumetric clouds
negative_passages.docid: 87509
negative_passages.text: Why is the 'straight line' path across continent so curved?
negative_passages.docid: 57667
negative_passages.text: Escape velocity from Earth
negative_passages.docid: 41112
negative_passages.text: Why do the planets' orbital distances fall on an exponential curve?