Constellation, and solar system, engineering, Other Engineering

Expertsmind.com brings you unique solution in electrical engineering

-          A constellation is a region of the sky with well defined borders; familiar star patterns help us locate these constellations.

-          To help us understand and map the sky. For reference, we identify 4 special points:-
- The north celestial pole is the point directly over the Earth's North Pole

- The south celestial pole ''           ''          ''          ''          "            South Pole

- The celestial equator , which is a projection of Earth's equator into space,

   makes a complete circle around the celestial sphere.

- The ecliptic is the path the sun follows as it appears to circle around the

  celestial sphere once each year. (23.5 degrees; same as earth)

1063_constellation.png

Local sky

-The point directly overhead (90 degrees perpendicular) is the Zenith.

- The meridian  is an imaginary line stretching between the 2 opposite sides of the horizon.

- We can pinpoint the position of any object in the local sky by stating its direction/azimuth  and its altitude  above the horizon.

-          Angular size of an object is the angle it appears to span in your field of view. The farther away an object is the smaller its angular size.

-          Angular distance between a pair of objects in the sky is the angle that appears to separate them in your field of view.

-          Latitude measure the north-south position on earth. (0 degrees at equator , 90 at north pole & affects constellations)
Longitude  measures east-west position. (is defined to be 0 degress along a line passing through Greenwich, England.

-           

-          The Seasons change every 3 months starting in summer; June

-           Lunar phases are the cycle of which the moon changes appearance and the time at which it rises.

-          Lunar eclipse occurs when Earth lies directly between the Sun and the Moon, so that the Earth's shadow falls on the moon

-          There are 3 types of lunar eclipses:-

-          1- Total lunar eclipse           
2-partial lunar eclipse

-          3- penumbral eclipse

-          Solar eclipse occurs when the moon lies in between the sun and the earth and so sun will completely or partially blocked.

 

1 Arseconnd:- The width of a finger at arm's length is about 1 degree. Remember that there are 60 arcminutes in 1 degree and 60 arcseconds in 1 arcminute.

Anglular size  = Physical size

        360 °             2 ¶ x distance

Ex. The angular diameter on the moon is about 0.5 degrees and the moon is about 380,000 km away. What is the Moon's physical diameter?

Solution

0.5     x          380,000
360°         2   x distance

 

=3316

= 3300 (rounded to nearest hundred) ¯

- The sun is highest up the sky during its equinoxes; spring and fall.

 

Posted Date: 2/11/2012 11:00:37 PM | Location : United States







Related Discussions:- Constellation, and solar system, engineering, Assignment Help, Ask Question on Constellation, and solar system, engineering, Get Answer, Expert's Help, Constellation, and solar system, engineering Discussions

Write discussion on Constellation, and solar system, engineering
Your posts are moderated
Related Questions
Q. Explain various stages of creep? Ans. CREEP: Creep can be defined as the process by which plastic flow occurs when a constant stress or load is applied to a material for a


A trimmed flight condition is perhaps best thought of as an equilibrium condition. The simplest trim condition is straight-and-level flight, in which the forces (weight, propulsive

Solvency Ratios: Profitability Ratios: The profitability ratios determine the capacity of the company to generate the profits with the amount of shareholders investment. Again hig

Assume you invest $150 per month in a stock. Stock prices are as follows: January $10.50, February $9.75, March $9.50, April $11.00, May $10.75, June $9.75, July $9.00, August $8.5

analyse modelling for safe home security system

Layout and operation of typical thrust reversing system: Clamshell door system The clamshell door system is a pneumatically operated system, as shown in detail in fig Norm

We will need to use several different flow models as we go along. It is crucial to understand the simplifications used to obtain these models because these limit the validity of th

APPLICATION TO THE AXIAL FLOW COMPRESSOR: In order for the compressor to deliver a high mass airflow for a minimum effort required to drive it, it is important that all the com

Q. Describe the electro slag welding process.                                                   OR        Describe electro slag welding process. What are the speci