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Astronomy

Astronomy is the study that deals with the physics, chemistry, mathematics and the evolution of celestial objects. The objects studied are moons, planets, stars, nebular and galaxies. Astronomers also look at the phenomenon that takes place outside of the Earth’s atmosphere such as supernovae explosions, gamma ray bursts and cosmos background radiation.

Cosmology, although often related, is different than astronomy. Cosmology studies the universe as a whole. Cosmology will be discussed in a later section.

Astronomy is one of the oldest sciences. There have been astronomical artifacts found in early civilizations such as Babylonians, Greeks, Chinese, Indians, Iranians and Maya. It is evident that they performed methodical observations of the night sky. The invention of the telescope however revolutionized modern science. It allowed astronomers to be able to see further into the universe. Before telescopes, the study of the sky was conducted from tall vantage points such as tall buildings and mountains.

Categories within Astronomy

Atmosphere

Postings: 25

A layer of gases which surround a material body of sufficient mass.

The evolution of the Copernican views

NOTE:PLEASE LET ME KNOW IF I AM CHOOSING THE WRONG CATEGORY BY CHOOSING PHYSICS/ASTRONOMY FOR THE BELOW QUESTIONS....IF SO PLEASE POINT ME IN THE RIGHT DIRECTION... What are the most convincing observations Galileo reports in The Starry Messenger that support the Copernican theory that the Earth moves around the Sun? What did

Galileo and the church

What are Galileo's his most convincing arguments for saying that science and religion should not be regarded as antagonistic? What role does mathematics play in Galileo's argument? How does he answer those who were concerned that a stationary sun and a moving earth were in conflict with the Bible, and with the story in Joshu

Astronomy: Absorption lines, wavelengths, hydrogen and helium fusion, sunspots

Please help in answering the following three conceptual questions: 1. Explain why the absorption lines of an element have the same wavelengths as the emission lines of that element. 2. Why can't hydrogen fusion and helium fusion go on at the same time at the center of a star? 3. What evidence do we have that there is a

Recent Discovery in Astronomy

I need some help with the following: Use a reliable source to find an article (preferably from a scientific journal) that examines a recent discovery or other current event in the field of astronomy. Review the selected article and write a synopsis of its content. I also need the appropriate citation. Thank you

elevation of the sun

For a place at a latitude of 55 degrees determine how high above the horizon the Sun is at noon on (a) the Vernal Equinox, (b) the Summer Solstice, and (c) the Winter Solstice If the sidereal period of the Moon was 29.0 days (instead of the correct 27.32 days) what would be its synodic period? (Hint: consider how far ar

Galileo Big Discoveries

Galileo shook the reality of the people in his time by using what instrument? Name 3 of his big discoveries that upset the "perfect heavens" notion of the times. What ultimately happened to him when he stood up for his discoveries?

Units and Measurements of Astronomical Distances

What is an astronomical unit (AU)? What is that same unit in kilometers? How far is it to Pluto in AU? What is a parsec (pc)? How many AU are in a parsec? What is the distance to the nearest star (Proxima Centauri) in pc? What is a light-year? How many light-years are there in a pc? What is the size of the Milky Way galaxy in li

Distance Comparisons of Planets and Stars

List the following in order of increasing length: size of the Sun distance from the Sun to the Earth size of Jupiter distance to Jupiter distance to the Moon distance to Pluto 2. You are cruising down the highway at 60 mph (100 kph) and, without losing speed you follow the road which veers to the right. Have

The Sun in Equilibrium

Please explain the energy output of the Sun, include how it produces energy, why it is in "equilibrium," and what this means.

Einstein & Astronomy and Its Ancient Roots

Einstein discovered that energy and mass are equivalent. What is one technological development that has emerged from this knowledge and is the human race better or worse off with it? Why do you think astronomy was important to people in ancient times? How do those beliefs affect us today?

Astronomy Questions

Include at least one reference per question other than self. When looking at the night sky, you can see the light of different stars. If one star looks brighter than another, is it necessarily brighter? Explain. Astronomical discoveries are imperative to science. How are they significant to our personal lives? Explain.

Absolute Brightness and Apparent Brightness

1. Explain the difference between Absolute Brightness and Apparent Brightness. 2. (a) When determining the temperature of an isolated star, do we require the distance to the star? Explain. (b) When determining the speed of an isolated star, do we require the distance to the star? Explain. (c) When determining the intrinsic

Astronomy: Sunsports, Heal and Planets

Please help answer the following questions. Include references in the solution. 1. Why do Sunspots always appear in pairs? 2. How can astronomers explore the layers of the Sun below its surface? 3. What is the source of heat for the Earth's interior? 4. What are the lunar maria composed of? How did they form? 5. What i

Basic astronomy problems

Four stars of different mass arrive on the Main Sequence of the Hertzsprung-Russell Diagram at the same time. Which star has a mass just about the same as the mass of the Sun? The star with spectral class B7 The star with spectral class F1 The star with spectral class G2 The star with spectral class M4 What is th

Astronomy

1. The two points on Earth intersected by its axis of rotation are known as the __________ and _____________________ . 2. What is the name of the line drawn on Earth dividing it into two equal halves, north and south? 3. Great circles are circles that pass through the North and South Poles on Earth. The Earth is divided

Is Astrology Science?

Can astrology be considered a science? NO personal opinions , you should search the web for suitable articles and comment on them. -You should give the websites you use. Thank you

General Astronomy

On a clear sunny day, the sky above us looks bright blue. In the evening, the sunset puts on a brilliant show of reds, pinks and oranges. Why is the sky blue? What makes the sunset red?

Astronomy - Parsec and Hubble's Constant

Question: (1) If a galaxy has a luminosity of 6.6x10^39 W and a brightness measured as 1.25x10^-11 W m^-2, How far away is the galaxy in mega parsecs? (2) An absorption line of the element beryllium is observed in the spectrum of the galaxy above as lying 509.4 nm. What is the speed of the recession of the galaxy in km s^

This posting guides users to write evaluations of poems.

This posting addresses this scenario: As you analyze this work, choose a poem by each of these poets. Then put together a journal entry that carefully evaluates the writing, based on a your 'Reader Response' reading of one (or more) of the poems. Focus on the element described as "romance." Describe the qualities of the poet'

Stars

Describe what Black Holes are and how they form. Can stars or other planets orbit a Black Hole? Explain why or why not. Why are O and B stars the brightest in open clusters? Why are red giants the brightest stars in globular clusters?

Cephid variable stars

Explain why Cephid variable stars are so useful for determining the distances of galaxies.

Contemporay Astonomy

I have given my response to the following chapter quiz questions (see attachment). Please correct and provide the correct answers if/when mine are incorrect. 1.Which of the following lists of different types of electromagnetic radiation is correctly ordered in wavelength, from shortest to longest? A) Gamma rays, ultrav

Applying physics in a career

My problem is how can physics help us in careers such us biotechnologist, astronomist, geology, biotechnology, aerospace, industry and communications?