Thursday, December 18, 2008

December 15, 2008


Many astronomers believe that the universe looks some what similar in all directions even though they only have images of the north and south. Even though there are MANY galaxies the hdf took ten days to send a light to get a picture and the hdfn took eleven days. So when they finally reach us we are seeing things that have been about 2 billion years old.

Aliens

I'm back and forth on if i believe there are aliens out there. There reason I think there might be is because there are MANY galaxies out there and how could we be the only ones. But also I believe there aren't aliens because you think we would have heard of them by now or spotted them, but also like i said there are many galaxies. I also don't beleive that Drake equation. I think theres no point.

Video over Nova Orgins

In this video it talked about the steady state theory of the universe which is the idea that the universe never changes. It also talked about COBE which how i describe it is a flash of light that makes the Earth visible. Also microwave radition sent out waves that interfered with telephone callers which helped us figure out what happened. Also the WMAP shots off into space and CBI is a tin arragement on top of a mountain.
WMAP traveled beyond Jupiter during its three month journey. Also i leared that they aren't sure where the iron came from. Also i learned that the things stars send out are the building blocks of life, which can be how humans are made of stardust. Also the Deep Extragalactic Imaging Multi-Object Spectrograph takes very clear pictures which helps us study everything a little bit better.

Wednesday, December 10, 2008

Stellar Evolution questions

1. No
2. That is needs more time than mass in its life cycle
3. No
4. It is the most common type of star in the Galaxy. They are observed to be strongly variable X-ray sources. They have a low mass.
5. They all go through a cycle

The videos helped by giving information about the cycle of all the stars. It also told us how not all stars turn into black holes. It also talked about a mass and time cycle just like the picture we used to get the answers to our questions.

Tuesday, December 2, 2008

BlackHoles

1. An event horizen is the distance, which can be represented as an imaginary sphere around the black hole. And an accretion zone is the area that the hole force gravity has an affect on.

2. Black hole is defined as a escape velocity that would have to be attained to escape from the gravational oull exerted upon an object.
Speed of light is a constant in a empty space.
Escape Velocity is the speed at which an object on the surface of a body must be propelled in order not to returnto that body under the influence of their mutual gravational attraction. It may also be defined as the speed required to propel an object on the surface of a body into a parabolic trajectory about that body.

3. A black hole is an object, typically a collapsed star, whose gravity is very strong that its escape velocity exceeds the speed of light. Since nothing is known to exceed the speed of light., nothing can escape from a black hole. they all have to deal with each other.

4. There are Stellar black holes, Supermassive black holes, and miniature black holes.

5. They thought black holes were invisible stars.

6. Because of the Hubble Space Telescope we are able to provide evidence of supermassive black holes that lurk in the center of some of our galaxies

7. The volume of the black hole is huge. Black holes have no mass.

Wednesday, November 26, 2008

Annie Cannon and her Specta

If I had to do one thing for the rest of my life it would have to be finding the money to cure starvation and malnutrition over the world because many people are dying because of the lack of food or the lack on nutrients. I would like to travel to Africa first and help the sick and homeless with this problem.

Thursday, November 13, 2008

asteroids

asteroids- I think we should be concerned about asteroids because there have been many predictions that one is going to hit the earth and destroy part of it. And if we stay concerned about them we could put the people in danger into a safer place if we have the right system to detect where the asteroid will hit. If you think about Tanguska and how much it would have helped if we knew it was coming then we could have saved somethings.
But then again if we don't have to equipment to figure out when and where the asteroids will hit then we can't save anybody. But I still think it is a good idea to be concerned about them and to keep studying about them just in case one hits the earth. It's never to late to discover something new. And it would be extremely helpful knowing when and where an asteroid will hit.

Wednesday, November 12, 2008

The World of Plate Tectonics

1.
a) Pangaea was when the world was all one land mass.
b) Sea Floor Spreading is when the ocean floor is extending when two plates move apart
c) Plate Boundaries are found at the edge of the plates and there are three types: Convergent, Divergent, Conservitive.
d) The Ring of Fire are a group of volcanoes in the Pacific Ocean from Hawaii to Japan
e) The Mid-Ocean Ridge is an underwater mountain range, it usually has a rift running along its axis formed by plate tectonics.
f) A shifting north and south pole only happens once in a very very long time and they don't know why.

2. The volcanoes on the moon are extinst, which the crust is not moving and its vice versa for mars.

3.
DUBO- 4.26mm/yr
HILO- 35.77mm/yr
KELY- 11.23mm/yr
HOFN- 14.87mm/yr
-It tells us they are slowly moving

4. The momentum of the water displaced by tectonic uplift had also dragged huge rocks. They each weigh a millions of tons
- the shape of ocean is where it originated and there was a sudden vertical rise in the sea bed
-energy released-the same as 26.3 megatons of tnt.

5.
1) the continents fit together like a puzzle
2) found fossils of animals that couldnot have survived unless the contenents were connected
3) found fossils of tropical plants in antarctica

Monday, November 10, 2008

Venus

My video is over Venus. It gives you a lot of information about the planet. It gives important facts about Venus. It told me that Venus is 12104 km and Earth is 12756 km. It is the second nearest planet to the sun. 67,237,900 miles. It is brighther than any other planet or any star. It has sulfuric acid and 97% of it has carbon dioxide. It is a very dry and hot planent. The temperature on Venus is about 470 degrees Celcius or 900 degrees F.

The Moons of Jupiter Lab

The periods of the four moons vary differently from each other. Ganymede had the best orbit because it was farther away and it took more time to make a complete orbit. The farther away the better because the less likely they will run into something. IO probably had the worst orbit because it was close together and it took a very short amount of time to finish one complete orbit.
Galileo would have probably had a difficult time seeing the moons with a 10x telescope because when doing the moons of Jupiter Lab, it was hard to see the moons at 100x. And when you zoomed in, it was hard to get all the moons in. Galileo decided that if Jupiter had its own mini system then why wasn't there one around the sun. Galileo believed the sun was the center of the universe.

The Moons of Jupiter Lab

The periods of the four moons vary differently from each other. Ganymede had the best orbit because it was farther away and it took more time to make a complete orbit. The farther away the better because the less likely they will run into something. IO probably had the worst orbit because it was close together and it took a very short amount of time to finish one complete orbit.
Galileo would have probably had a difficult time seeing the moons with a 10x telescope because when doing the moons of Jupiter Lab, it was hard to see the moons at 100x. And when you zoomed in, it was hard to get all the moons in. Galileo decided that if Jupiter had its own mini system then why wasn't there one around the sun. Galileo believed the sun was the center of the universe.

Wednesday, November 5, 2008

Wednesday, 11/5/08

I enjoyed the Physics PheT Lab. I thought it was interesting and it gives a GREAT visual of how the solar system works. It was also easy to understand. After watching the video clip I realized how big of a difference there was in the different planets. It was also a good visual. I noticed though that Venus and the Earth were close and size. I thought the Lab and video clip were great props to have a better understanding about the solar system.

Sunday, November 2, 2008

Ray Davis/John Bahcall


Ray Davis/John Bahcall
(1944-)/(1934-2005)
*suggested that it might be possible to detect neutrinos from the sun as a result of Bahcall's calculations on solar nuclear reactions.
http://archive.sciencewatch.com/interviews/john-n-bahcall.htm

S. Chandrasekhar


S. Chandrasekhar
1910-1995
*developed the theory of white dwarf stars, showing that quantum mechanical degeneracy pressure cannot stabilize a massive star.
http://www.phys-astro.sonoma.edu/bruceMedalists/Chandrasekhar/index.html

Arno Penzias/Robert Wilson


Arno Penzias/Robert Wilson
(1933-)/(1936-)
* they recognized it as what is now called the Cosmic Microwave Background (CMB)
http://www.bnsc.gov.uk/4728.aspx

Annie Cannon


Annie Cannon
1863-1941
*established the system of classifying the spectra stars.
http://astro.berkeley.edu/~gmarcy/women/cannon.html

Clyde Tombaugh


Clyde Tombaugh
1906-1997
*discovered Pluto
http://www.klx.com/clyde/

Johannes Kepler


Johannes Kepler
1571-1630
*discovered that the Earth and planets travel about the sun in elliptical orbits.
*He gave three fundamental laws of planetary motion.
http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Kepler.html

Albert Einstein


Albert Einstein
1879-1955
* the eclipse experiment of 1919 helped to prove his bending of light theory.
*
received the a Nobel Prize in 1921
http://www.geocities.com/CapeCanaveral/Launchpad/4515/HISTORY.html#Einstein


Edwin Hubble


Edwin Hubble
1889-1953
*He discovered that the degree of redshift observed in light coming from a galaxy increased in proportion to the distance of that galaxy from the Milky Way. This became known as Hubble's Law and would help establish that the universe is expanding.
http://en.wikipedia.org/wiki/Edwin_Hubble

Wednesday, October 29, 2008

Isaac Newton


Isaac Newton
1643-1727
*He suggested that a particle, if released, would spiral in to the center of the Earth. Hooke wrote back, claiming that the path would not be a spiral, but an ellipse.
http://scienceworld.wolfram.com/biography/Newton.html

Galileo Galilei


Galileo Galilei
1564-1642
*pioneered "experimental scientific method" and was the first to use a refracting telescope to make important astronomical discoveries
*discoveries using his new telescope, including the moons of the planet Jupiter and the phases of the planet Venus (similar to those of Earth's moon).
*Galileo's observations with his new telescope convinced him of the truth of Copernicus's sun-centered heliocentric theory.
* Galileo's support for the heliocentric theory got him into trouble with the Roman Catholic. Sentenced to life imprisonment.
*
http://www.lucidcafe.com/library/96feb/galileo.html

Tycho Brahe



Tycho Brahe
1546-1601
* made a remarkable star catalogue of over 1000 stars
*He proved that comets are not objects in the atmosphere.
http://www.nada.kth.se/~fred/tycho/index.html

Tuesday, October 28, 2008

Copernicus


Copernicus
1473-1543
*Proposed that the Sun, not the Earth, was the center of the Solar System. Such a model is called a heliocentric system in the 16th century.
http://csep10.phys.utk.edu/astr161/lect/retrograde/copernican.html


Henrietta Leavitt


Henrietta Leavitt
1868-1921
*determine a star’s photographic brightness. Leavitt determined the absolute magnitude of about 47 stars near the North Pole. These stars were used as a standard to determine others stars’ brightness
http://pvastro0714.blogspot.com/2008/03/henrietta-swan-leavitt.html

James Van Allen


James Van Allen
1914-2006
* best known for discovering radiation belts encircling Earth
http://www.astronomy.com/asy/default.aspx?c=a&id=4452

Albert Michelson (Michelson-Morley experiment)


Albert Michelson (Michelson-Morley experiment)
1852-1931
* In 1878, began to work on confirming the existence of the mysterious "aether."
http://www.usd.edu/phys/courses/phys300/gallery/clark/mich.html

Pope Gregory XIII


Pope Gregory XIII
1502-1585
*changed the calendar in 1582
http://www.answers.com/topic/pope-gregory-xiii


Stephen Hawking


Stephen Hawking
1942-present
*In 1974 he decided to study the effects quantum mechanics might have on particles near a black hole. He theorized that particles are created in pairs, black and white for example. The black particle is absorbed by the black hole, the white particle, now without a partner, appears as radition.
http://www.hotliquidmagma.com/space/html/hawking.html

Carl Sagan


Carl Sagan
1934-1996
*He helped solve the mysteries of the high temperature of Venus, the seasonal changes on Mars and the reddish haze of Titan.
*
Sagan was the author of many best sellers
http://www.mediamasters.com/sagan.htm

Ptolemy


Ptolemy
* approx. 87 to probably 170 AD.
*system of astronomy, written in his book the Syntaxis, was accepted until 1543
* used three mathematical constructions, the eccentric, epicycle, and equant, to account for the movements of the planets.
http://library.thinkquest.org/29033/history/ptolemy.htm

Hipparchus


Hipparchus
190-120 BCE
*Hipparchus made extensive observations of star positions, and is credited by some with the production of the first known catalogue of stars.
http://www.hps.cam.ac.uk/starry/hipparchus.html

Aristotle


Aristotle
384-322 BCE
*Aristotle argued that the universe is spherical and finite
*To prove that the earth is a sphere, he produced the argument that all earthly substances move towards the center, and thus would eventually have to form a sphere.
http://www.perseus.tufts.edu/GreekScience/Students/Tom/AristotleAstro.html