121-ch1-07 - Milky Way Galaxy-1 Milk Vapor Stars Dusts A...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Milky Way Galaxy-1 Milk? Vapor? Stars? Dusts? A Typical Galaxy M31 in Andromeda--our neighbor galaxy (~ 2.3 M light years away) M31 Satellite galaxies Our own Milky Way Galaxy NASA computerrendered image from observational data How many galaxies are there in the universe? ~ hundreds, perhaps thousands, of billions Most dots of light in this picture are galaxies each containing ~100 billion stars like our sun. So where exactly are we? In the outskirt of the Milky Way galaxy We are somewhere here The (New) Solar System Aug 2006 8 planets, 3 dwarf planets, etc. The Solar System The Sun Our Energy Source Pluto recently downgraded to become a "dwarf planet" Neptune Uranus Saturn Jupiter Asteroids - Ida Mars A pale blue dot...Carl Sagan Earth rise Looking at the Earth from the Moon Earth from Space Ocean as seen by the International Space Station Getting closer Above Himalayas And closer... Mississippi Delta Hydrosphere Biosphere Cryosphere The Antarctic The Arctic Earth System Science Traditionally, there are many fields of studies related to the earth environment, for example: meteorology, geography, geology, oceanography, limnology, glaciology, forestry, soil science,... New point of view Each of these fields represents a part of the earth system science. Earth interior "Spheres" of the Earth System Atmosphere Hydrosphere (oceans, rivers, lakes, etc.) Biosphere (forests, grasslands, animals, algae, microbes, etc.) Cryosphere (mainly polar ice, glaciers) Pedosphere (soil layer) Lithosphere (rock layer) Mantle Core ...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern