与 «MEGAPARSEC»相关的英语书籍
在以下的参考文献中发现
megaparsec的用法。与
megaparsec相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。
1
How Old Is the Universe?
... to a distance of 1 billion light-years or more. When we achieved that goal,
astronomers predicted, we would find that the value of H had in the distant past
been larger than the current-day value of 74 kilometers per second per
megaparsec.
2
Cosmology: The Science of the Universe
In other words, the recession velocity increased with distance by 150 kilometers
per second for every million light years (or 500 kilometers per second for every
megaparsec). In 1952, Walter Baade discovered the two stellar populations.
3
History of Shock Waves, Explosions and Impact: A ...
Since the late 1950s astronomers have been arguing for an H0 value of between
50 and 100 km/s/megaparsec, where one ... s/megaparsec, as recently
determined with an uncertainty of only 10% (itself a milestone achievement in ...
4
The Extravagant Universe: Exploding Stars, Dark Energy and ...
For H0 = 70 kilometers per second per megaparsec, this is 1 X 10~26 kilogram
per cubic meter — a very low density, indeed! Then Q is the actual density
divided by the critical density, so it is exactly one when the observed density is
equal to ...
5
The Cosmic Keyhole: How Astronomy Is Unlocking the Secrets ...
Now, if you do the math and manipulate the relationship that Hubble discovered (
we will not go into that here), it tells us that the universe is expanding at about 80
km a second for every megaparsec, with an error of plus or minus about 17 km/s
...
6
Astronomy for Entertainment
But soon the kiloparsec was found inadequate and astronomers were obliged to
introduce the "megaparsec," which equals one million par- sees. Here is a table
of stellar units of length: 1 megaparsec =1 million parsecs 1 kiloparsec =1 ...
7
The Universe at Midnight: Observations Illuminating the Cosmos
If astronomers could determine the Hubble constant's numerical value, it would
state how much galaxy redshifts (in kilometers per second) increase for every
megaparsec farther an astronomer looks (one megaparsec is 3.26 million ...
8
Transactions on Computational Science XIV: Special Issue on ...
Alpha,. Betti. and. the. Megaparsec. Universe: On. the. Topology. of. the. Cosmic.
Web. Rien van de Weygaert1, Gert Vegter2, Herbert Edelsbrunner3, Bernard J.T.
Jones1, Pratyush Pranav1, Changbom Park4, Wojciech A. Hellwing5, Bob ...
Marina Gavrilova, Mir Abolfazl Mostafavi, C.J. Kenneth Tan, 2012
9
Cosmic Entity: A Timeless Perception of the Universe
Current estimates place H0 somewhere between 50 and 100 km·s-1·Mpc-1 (
kilometers per second per megaparsec). A parsec (megaparsec = one million
parsecs) is an astronomical unit of distance. A parsec (or parallel second) is the ...
10
Functions and Change:A Modeling Approach to College Algebra
The currently accepted value of Hubble's constant is 70 kilometers per second
per megaparsec. (One megaparsec is about 3.086 X 1019 kilometers.) With
these units for H, the distance D is measured in megaparsecs, and the velocity
Vis ...
Bruce Crauder, Benny Evans, Alan Noell, 2013
包含词语«MEGAPARSEC»的新条目
找出国内和国际出版社所讨论的内容，以及词语
megaparsec在以下新条目的上下文中是如何使用的。
9 Stunning Comparisons Show How Massive the Universe Really Is
The universe keeps expanding (at 42.5 miles per second per megaparsec), and we constantly form new hypotheses about how it was created ... «Mic, 五月 15»
How do astronomers know the age of the Universe?
Edwin Hubble himself calculated the figure at around 530 km per second per megaparsec; today, we know the figure is between 65 and 80 km ... «Geek Snack, 四月 15»
The past according to Planck: Cosmologists got a lot right
Planck data indicate that objects located a megaparsec (about 3 million light-years) away from each other move apart at roughly 68 kilometers ... «Science News, 二月 15»
How fast is the universe expanding?
And then I said something that sounded like "blah blah Lando blah blah Kessel Run 68 km/s per megaparsec". Which translates to if you have a ... «Phys.Org, 二月 15»
Why is Andromeda coming toward us?
The most recent calculation by NASA in 2013 put this amount at 70.4 kilometers per second per megaparsec. At a billion light-years away, the ... «Phys.Org, 一月 15»
Cutting Edge Technology Is Hitting the Slopes and Transforming …
The updated figure lands at about 46.2 miles per second, per megaparsec. Just try to make sense of that for a second. Luckily, things here on ... «SportTechie, 一月 15»
10 facts about the Milky Way
In the case of the Virgo Supercluster, at least 100 galaxy groups and clusters are located within it massive 33 megaparsec (110 million ... «Phys.Org, 十二月 14»
Most precise snapshot of the universe unveiled
... current rate of cosmic expansion — holds steady in the new results at 67.3 kilometers per second per megaparsec. This value was previously ... «Science News, 十二月 14»
Single hotspot may be the source of many ultrahigh-energy cosmic …
That still covers a lot of ground, given that the nearest galaxy, Andromeda, is less than one Megaparsec away—it's enough to encompass some ... «Ars Technica, 七月 14»
Quasars Track Expanding Universe
While a relatively simple concept, its units are slightly wacky at km/s per megaparsec (a parsec is 3.26 lightyears). The history of the universe ... «SkyandTelescope.com, 四月 14»
