Astronomy 1010-HFall_2015Day-29

Planetary Astronomy

Course Announcements• How is the sunset/sunrise observing going?

• SW-chapter 8 posted: due Wed. Nov. 4

• Exam-3 Wed. Nov. 4: Ch. 6, 7, 8• I will collect the L-T books on Monday, Nov. 23• Dark Night Observing (last 2 of semester):

• Thursday Nov. 5• Monday Nov. 9

• 1st Quarter Obs. (last one of semester): Thurs. Nov. 19• Reports Due: Monday Nov. 23 – AT CLASS TIME!

Registration for the Spring semester starts soon so think about taking more astronomy.

ASTR-1010/1011: Planetary Astro & lab (Tell your friends)ASTR-1020/1021: Stellar Astronomy & lab (Reg. + Honors)ASTR-2020: Problems in Stellar AstronomyASTR-3010: History of AstronomyASTR-3040: Intro. To AstroBiologyPHYS-2468: Intro. To Physics Research

ASTR-3030/3031: Instrumentation & Techniques

Volcanism is related to tectonism and is a sign of geologic activity.

The movement of the tectonic plates generates a lot of thermal energy from friction.

This energy combines with heat from convection cells in the mantle to heat portions of the lower crust and upper mantle as magma.

Volcanoes form (mostly) at hot spots and plate boundaries.

Very fluid lava forms shield volcanoes. Thick lava forms composite volcanoes.

The Moon does not have any volcanoes, but lava flows smoothed out parts of its surface.

Mercury also has smooth surfaces from past volcanism, and a few inactive volcanoes have been identified.

The volcanoes on Mars are the largest mountains in the Solar System, and are shield volcanoes (largest = Olympus Mons).

Venus has the largest amount of volcanoes in the Solar System.

Erosion includes processes that wear down the high spots and fill in the low.

On Earth, wind and water strongly erode features.

Wind also modifies the surfaces of Venus and Mars, especially on Mars with its loose dust.

Water While Earth is the

only planet with liquid water, there is much evidence that Mars was once wetter than it is today.

Canyons, dry riverbeds, layered rock.

Water

Large deposits of subsurface ice have been detected beneath Mars’ surface, deep under craters as well as just beneath the soil.

Water ice could exist on Mercury and was observed on the Moon after NASA crashed a vehicle into a crater.

Water

Impacts have far-reaching consequences. The mass extinction of the dinosaurs marked in

the Cretaceous-Tertiary boundary could be evidence of a very large impact.

Recent Collisions

Earth’s Surface

Torino Scale

Impact Energiesand these are the small ones

Earth’s Changing Surface Lecture Tutorial pg. 101

Work with a partner!Read the instructions and questions carefully.Discuss the concepts and your answers with

one another. Take time to understand it now!!!!

Come to a consensus answer you both agree on and write complete thoughts into your LT.

If you get stuck or are not sure of your answer, ask another group.

Concept QuizA Bigger Earth

You discover an Earth-like planet around another star, but the planet has twice the mass of Earth. What would you not expect to see?

A. a highly cratered surfaceB. an atmosphere C. volcanoes and tectonic platesD. erosion and weathering

Exam – 3 To Here