query: What actually Dark energy is ?
positive_passages.docid: 151624
positive_passages.text: Dark matter and dark energy
negative_passages.docid: 47890
negative_passages.text: What is gravitational radiation?
negative_passages.docid: 68282
negative_passages.text: How do people calculate proportions of dark matter, dark energy and baryonic matter of the universe?
negative_passages.docid: 47395
negative_passages.text: What exactly is light?
negative_passages.docid: 54636
negative_passages.text: Dark Energy / Accelerating universe: naive question
negative_passages.docid: 82927
negative_passages.text: What is "pure energy" in matter-antimatter annihilation made of?
negative_passages.docid: 74770
negative_passages.text: Is Dark Matter called "Matter" only because of gravity?
negative_passages.docid: 49047
negative_passages.text: Redshifted Photon Energy
negative_passages.docid: 63414
negative_passages.text: What are the pieces of evidence that universe is expanding?
negative_passages.docid: 113304
negative_passages.text: Universe expands ... compared to what?
negative_passages.docid: 156003
negative_passages.text: Dark energy and dark matter
negative_passages.docid: 65001
negative_passages.text: Universe from nothing?
negative_passages.docid: 92937
negative_passages.text: What exactly is 'Dark Matter'?
negative_passages.docid: 103881
negative_passages.text: Gravitational waves as dark energy?
negative_passages.docid: 49514
negative_passages.text: Do we have a better understanding of what energy is since Feynman's time?
negative_passages.docid: 46739
negative_passages.text: Dark Energy saving the world
negative_passages.docid: 3103
negative_passages.text: How do we know the universe is expanding, and not that its contents are shrinking?