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Read our letters of reference from the list below to see what our clients have to say about the experience of working with Alpha Construction. Reference Letters was last modified: We are non-profit builders of affordable housing and have worked with Alpha Construction many times, most recently on our Stovall Villa Community, completed in Alpha is currently providing pre-construction services for our Courtyard at La Brea Apartments, scheduled to break ground in February of this year.

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January 18, They are an average of 4. The third star is Proxima Centauri. It is about 4. Alpha Centauri A and B orbit a common center of gravity every 80 years. The Alpha contracting distance between them is about 11 astronomical units AU — about the same distance as the sun is to Uranus.

Proxima Centauri is about one-fifth of a light-year or 13, AUs from the two other stars, a distance that makes some astronomers question whether it should be considered part of the same system. Proxima Centauri may be passing through the system and will leave the vicinity in several million years, or it may be gravitationally bound to the binary pair.

If it's bound, it has an orbital period around the other two of aboutyears. Planet potential Astronomers announced in August that they had detected an Earth-size planet orbiting Proxima Centauri. The newfound world, known as Proxima b, is about 1.

The planet is also in the star's habitable zonethat just-right range of distances where liquid water can exist. Proxima b lies just 4.

As a result, it's likely that the exoplanet is tidally locked, meaning it always shows the same face to its host star, just as the moon shows only one face the near side to Earth.

However, it's unclear just how habitable Proxima b is from today's telescopes. This means that astronomers need to run models and do comparative studies to better understand how habitable the planet might be.

As a start, the planet needs a closer look for Alpha contracting to look for signs of an atmosphere. From there, the investigators can extrapolate if that atmosphere if present allows liquid water to flow on the surface.

Even the surface temperature of the planet depends on the atmosphere, which would also play into habitability characteristics.

Because Proxima b is so close to a red dwarf, habitability problems are already coming to scientists' minds. For one thing, the planet is so close that it likely is tidally locked to the star, meaning that one side of the planet is always facing the star.

This means one side of the planet would be very warm, while the opposite side would be very cold — unless winds could distribute the heat around the planet.

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That makes it hard for life to exist. But the planet's close distance to the red dwarf presents other problems too. Red dwarfs are unstable stars, particularly when they are young — they have a lot of stellar activity and produce charged particleswhich can produce intense radiation on nearby planets.

Some of this radiation can strip molecules off the top of a planet's atmosphere and thin it over time, according to studies led by the NASA Goddard Space Flight Center in Greenbelt, Maryland.

Studies of red dwarf stars are ongoing to better understand the habitability of Proxima b. In Novemberanother planet in the habitable zone of a red dwarf was discovered that's almost as close to Earth as Proxima b is.

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Called Ross bthis planet orbits a red dwarf star that appears much quieter than that of Proxima b. The research team said that finding out more about its atmosphere will require a next-generation telescope such as the European Extremely Large Telescope, the Giant Magellan Telescope and the Thirty Meter Telescope that all are expected to bbe active in the s.

The James Webb Space Telescope, set to launch incan't do the search itself since the planet does not transit across the face of its star. Binary stars To the naked eye, the two main stars shine as one, making them the third brightest "star" in our night sky. The two separate stars can be seen through a small telescope; one of the finest binary stars that can be observed.

Proxima Centauri is too faint to see unaided, and through a telescope it appears about four diameters of the full moon away from the other two. It is a yellow star of the same type G2 as the sun, and it is about 25 percent larger. Alpha Centauri B is an orange K2-type star, slightly smaller than the sun.

Proxima Centauri is a red dwarf about seven times smaller than the sun, or one-and-a-half times bigger than Jupiter. All three stars are a bit older — 4.

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Our Nearest Neighbors ] The system is in the Southern sky and is not visible to observers above the latitude of 29 degrees north — a line that passes near Houston, Texas, and Orlando, Fla.

Its right ascension is 14h 39m 41s and its declination is minus 60 degrees 50 minutes 7 seconds. Though they look serene and silent from our vantage on Earth, stars are actually roiling balls of violent plasma.Performance Evaluation for Construction Contractors / Construction Managers Policy: Performance Evaluations will be prepared for all contractors, subcontractors and construction management firms on Port Authority construction projects, and less than satisfactory ratings received during the previous three years will be considered in contract award determinations.

Hammered (Dad Bod Contracting Book 1) - Kindle edition by Jasinda Wilder. Contemporary Romance Kindle eBooks @ You're In Great Hands. Alpha Southwest, Inc. is New Mexico’s premier supplier of custom engineered pumping systems, fluid handling systems, water treatment systems, wastewater & storm water pumping systems, SCADA systems, and measurement instruments.

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