NASA's Infrared Observatory Measures Expansion of Universe
WASHINGTON -- Astronomers using NASA's Spitzer Space Telescope have announced one of the most precise measurements yet of the Hubble constant, or the rate at which our universe is stretching apart. The Hubble constant is named after the astronomer Edwin P. Hubble, who astonished the world in the 1920s by confirming our universe has been expanding since it exploded into being 13. 7 billion years ago. In the late 1990s, astronomers discovered the expansion is accelerating, or speeding up over time. Determining the expansion rate is critical for understanding the age and size of the universe. Unlike NASA's Hubble Space Telescope that views the cosmos in visible and short-wavelength infrared light, Spitzer took advantage of long-wavelength infrared light for its latest Hubble constant measurement of 74. 3 kilometers per second per megaparsec. A megaparsec is roughly three million light-years.
Keywords:
Space Telescope Hubble Space Telescope expansion rate Spitzer Space Telescope NASA dark energy apparent brightness the hubble measurements the universe Hubble telescope Space Telescope Science Institute Carnegie Institution Freedman Wilkinson Microwave Anisotropy Probe our universe astronomers cepheids infrared cosmic distance ladder intrinsic brightness Jet Propulsion Laboratory Large Magellanic Cloud cosmos stars new and improved NASA Headquarters cosmology infrared vision Michael Werner variable stars Henrietta Leavitt cosmic dust candles Space Flight Nobel Prize Mark Seibert Milky Way Astrophysical Journal standard candles Eric Person Observatories scientist megaparsec galaxy light-years rungs ground-breaking speeding AnisotropyPeople:
Spitzer
Overall Sentiment: 0.310356
Relevance: 0.882005
Wendy Freedman
Overall Sentiment: -0.0778912
Relevance: 0.400296
| Sentiment | Quote |
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| -0.248047 | "Just over a decade ago, using the words 'precision' and 'cosmology' in the same sentence was not possible, and the size and age of the universe was not known to better than a factor of two," said Freedman. |
| -0.209254 | "Just over a decade ago, using the words 'precision' and 'cosmology' in the same sentence was not possible, and the size and age of the universe was not known to better than a factor of two," said Freedman. "Now we are talking about accuracies of a few percent. It is quite extraordinary." |
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Edwin P. Hubble
Overall Sentiment: 0.29568
Relevance: 0.345286
Michael Werner
Overall Sentiment: 0.0521376
Relevance: 0.297321
| Sentiment | Quote |
|---|---|
| 0 | "Spitzer is yet again doing science beyond what it was designed to do," said project scientist Michael Werner ... |
| 0.0508235 | "First, Spitzer surprised us with its pioneering ability to study exoplanet atmospheres," said Werner, ... |
| 0.0984688 | "First, Spitzer surprised us with its pioneering ability to study exoplanet atmospheres," said Werner, "and now, in the mission's later years, it has become a valuable cosmology tool." |
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Glenn Wahlgren
Overall Sentiment: 0.034852
Relevance: 0.239915
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| 0.0840199 | "These pulsating stars are vital rungs in what astronomers call the cosmic distance ladder: a set of objects with known distances that, when combined with the speeds at which the objects are moving away from us, reveal the expansion rate of the universe," said Wahlgren. |
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Henrietta Leavitt
Overall Sentiment: 0.0407703
Relevance: 0.229488
Disambiguation: Academic | Astronomer | ScientistReferences:
Mark Seibert
Overall Sentiment: 0
Relevance: 0.187287
Disambiguation: Composer | MusicalArtist | MusicalGroupMember | RecordProducerReferences:
Jane Rigby
Overall Sentiment: 0
Relevance: 0.187112
Barry Madore
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Relevance: 0.180498
Chris Burns
Overall Sentiment: 0
Relevance: 0.174368
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S. Eric Person
Overall Sentiment: 0
Relevance: 0.173355
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Andy Monson
Overall Sentiment: 0
Relevance: 0.16202
Victoria Scowcroft
Overall Sentiment: 0
Relevance: 0.161242
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Additional Info:
FieldTerminology: astronomers
Overall Sentiment: 0.255669
Relevance: 0.485506
Technology: Hubble Space Telescope
Overall Sentiment: 0
Relevance: 0.458167
Technology: Spitzer Space Telescope
Overall Sentiment: 0.737058
Relevance: 0.441745
Technology: Hubble
Overall Sentiment: 0.304187
Relevance: 0.434486
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NASA's Infrared Observatory Measures Expansion of Universe
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Astronomers using NASA's Spitzer Space Telescope have announced one of the most precise measurements yet of the Hubble constant, or the rate at which our universe is stretching apart.
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