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How can you get all the J2000 coordinates of the 100 billion galaxies in the universe?
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∙ 10y ago
The 100 billion galaxies are an estimate for the number of galaxies in the observable Universe. The current estimate is a bit larger, around 170 billion. Nobody has actually counted all of them, much less mapped all their coordinates - and I don't this will be done any time soon.
Wiki User
∙ 10y ago
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Will astronomers get all the J2000 coordinates of the 100 billion galaxies in the universe?
Maybe someday in the future astronomers will get all the J2000 coordinates of the 100 billion galaxies in the universe.
Will astronomers have all J2000 coordinates of 100 billion galaxies in the observable universe?
It is possible that someday astronomers have all J2000 coordinates of 100 billion galaxies in the observable universe.
Can astronomers make an astronomical catalog that lists B1950 and J2000 equatorial coordinates and cross-identifications for all 100 billion galaxies in the observable universe?
No, because it will be impossible for astronomers to make an astronomical catalog that lists B1950 and J2000 equatorial coordinates and cross-identifications for all 100 billion galaxies in the observable universe.
How can you get all J2000 coordinates of all 100 billion galaxies in the universe?
The 100 billion galaxies are an estimate for the number of galaxies in the observable Universe. The current estimate is a bit larger, around 170 billion. Nobody has actually counted all of them, much less mapped all their coordinates - and I don't this will be done any time soon.
Where is the center of our galaxy?
The center of our galaxy is at a distance that is estimated to be between 25,000 and 28,000 light-years. As to the direction, it is in the constellation Sagittarius. If you want coordinates, the Wikipedia lists the following (article: galactic center): "In the Equatorial coordinate system they are: RA 17h45m40.04s, Dec -29° 00' 28.1" (J2000 epoch)."
What kind of V8 motor would best fit in a 1965 J2000 Jeep pickup?
maybe a 327 vigilante
Where is k-pax in constillation lyra?
If we can believe in Prot, there is near to Vega, maybe at epsilon 1/epsilon 2 lyr (J2000: RA 18h 44m 20-23s, DEC +39° 36-40'). The only problem is, the eps1lyr and eps2lyr are just 160 light year far from Earth, and Prot said, the K-Pax is about 1000 ly far from Earth. (Sorry for my English spelling)
More about Andromeda galaxy?
Wider and possibly brighter than our own Milky Way, the Andromeda Galaxy was once thought to be the dominant member of the Local Group of galaxies. Although it is Milky Way's nearest large galactic neighbor, this large spiral galaxy (type Sb with two arms) lies around 2.52 ± 0.14 million light-years (ly) from the Solar System (Ribas et al, 2005). It can be found in (0:40:27+40:40:12, J2000; and 0:42:44.3+41:16:9.4, ICRS 2000) Constellation Andromeda, the Chained Maiden. It is located northwest of Mu and Beta Andromedae (Mirach); west of Nu Andromedae; northeast of Theta and Sigma Andromedae; north of Pi, Delta, and Epsilon Andromedae; and south of Theta and Omega Cassiopeiae. Andromeda can be seen by Human eyes from Earth without a telescope as a "little cloud" (see Akira Fujii's photo to better relate the galaxy's location to the brightest stars of Constellation Andromeda).
What does Bonneville mean?
I believe the word comes from German; Bonne (good) ville (town). Pontiac surely picked this name in 1957 to be associated with the Bonneville salt flats, and the high performance the name inferred. Other classis Pontiac names such as GTO, Trans Am, Formula, Grand Prix, Lemans, ect all are race inspired. Opinion: I Wish they would bring the classic names back. Pontiac tried this stupid numerical naming routine in the early 1980 with cars like the 6000, j2000, t1000, and it failed miserably. But I guess the new top brass at GM doesn't remember or care about heritage, only wanting to look "euro" to young buyers, so we get things like the G6, G5, G8. Good cars but no "personality"-something that has plauged GM offerings since the Rodger Smith era. Don't get me started about the 2004-2006 GTO, it was a fine car but certainly lacked the style needed to carry the nameplate most reviered by Pontiac diehards.
How Is A Day?
There are at least 3 meanings of the word "day":1.) If by "day" you refer to the rotation period of the Earth with respect to the Sun, that's the solar day. It has natural variations during the year, so we use the average, called the "mean solar day". It's exactly 24 hours, but see belowfor a slight amendment to this.Incidentally, the Earth's solar day has increased in length over time. The length of one day, when the Earth was new about 4.5 billion years ago, was about six hours as determined by computer simulation. It was 21.9 hours 620 million years ago as recorded by rhythmites (alternating layers in sandstone). This phenomenon is due to tides raised by the Moon which slow Earth's rotation.2.) The "SI " (the International System of Units) definition. The "SI second" was defined according to measurements of the length of the mean solar day in the early part of the 19th century (24 hrs x 60 min x 60 secs = 86,400 seconds per day). The length of the mean solar day has increased and is now about 86,400.002 SI seconds. It continues to increase by about 1.7 milliseconds per century. The Earth's rotation speed varies in an irregular manner over a period of several years, but overall it is slowing. The modern SI second is defined using "atomic clocks" and doesn't depend on the Earth's motion at all.In "SI", a "day" is defined as exactly 86,400 "SI" seconds. This is the "day" of our 24 hour clocks. This day is shorter than the actual average solar day by about 0.002 seconds. For this reason, we have occasionally added a leap second to our clock to keep it more closely synchronized to the Earth's rotation. This policy is currently under review and we may soon cease to add leap seconds if it is determined that the inconvenience of adding leap seconds is greater than the inconvenience of not adding them.3.) Then there is the, sidereal day which is the rotation period relative to the distant stars. Its J2000 mean value is 23 hours 56 minutes 4.090530833 seconds. (Sidereal is from Latin: sidus = star, genitive case: sideris.)There's actually another, related definition, called a "stellar day", but I'm sure that's more than enough detail already, for most people.
What is the most commonly well known constellation?
In 1922, Henry Norris Russell aided the IAU (International Astronomical Union) in dividing the celestial sphere into 88 official constellations. Where possible, these modern constellations usually share the names of their Graeco-Roman predecessors, such as Orion, Leo or Scorpius. The aim of this system is area-mapping, i.e. the division of the celestial sphere into contiguous fields. Out of the 88 modern constellations, 36 lie predominantly in the northern sky, and the other 52 predominantly in the southern. In 1930, the boundaries between the 88 constellations were devised by Eugène Delporte along vertical and horizontal lines of right ascension and declination. However, the data he used originated back to epoch B1875.0, which was when Benjamin A. Gould first made the proposal to designate boundaries for the celestial sphere, a suggestion upon which Delporte would base his work. The consequence of this early date is that due to the precession of the equinoxes, the borders on a modern star map, such as epoch J2000, are already somewhat skewed and no longer perfectly vertical or horizontal. This effect will increase over the years and centuries to come. Probably one of the best known constellations ic Ursa Major (Latin: "Larger She-Bear"; also known as the Great Bear and Charles' Wain) ‑ a constellation visible throughout the year in most of the northern hemisphere. It can be seen best in the month of April. It is dominated by the widely recognized asterism known as the Big Dipper or the Plough, which is a useful pointer towards the north, and it has mythological significance in numerous world cultures. Best regards, Aleh Aprelenka
What is the length of day time for the summer?
The planet's rotational period is the only thing that determines the length of one day. (mostly - it also is dependent on how fast the planet orbits the sun. If it orbits quickly, the "day" will be measurably less than the time for one full rotation.)
