New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here

ASTR Chapter 8 Part 2

by: Wesley Fowler

ASTR Chapter 8 Part 2 ASTR 151 001

Marketplace > Astronomy > ASTR 151 001 > ASTR Chapter 8 Part 2
Wesley Fowler

GPA 3.97

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

These notes detail Mercury, the closest planet to the Sun. Topics covered include the planet's surface, orbit, interior, and evolution.
Journey Thr Solar Sys Lecture
Dr. Sean Lindsay
Class Notes
scarp, Rupe, Caloris Basin, planet, mercury, Hollow, core, Shrink
25 ?




Popular in Journey Thr Solar Sys Lecture

Popular in Astronomy

This 3 page Class Notes was uploaded by Wesley Fowler on Thursday April 14, 2016. The Class Notes belongs to ASTR 151 001 at a university taught by Dr. Sean Lindsay in Spring 2016. Since its upload, it has received 16 views.


Reviews for ASTR Chapter 8 Part 2


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 04/14/16
Wesley Fowler ASTR Chapter 8 Introduction to Mercury Distance from Sun: 0.4 AU Radius: 2,440 km (slightly larger than the Moon) 23 Mass: 3.3 x 10 kg 3 Average Density: 5,400 kg/m (Very high) Orbital Period: 88.0 days Rotational Period: 58.6 days Axial Tilt: 0.034 - (Don’t need to memorize these) Has an extreme variation in temperature due to lack of atmosphere and very long Solar Days Does have a magnetic field Does not have a permanent atmosphere Mercury’s Orbit Mercury has the highest eccentricity of all the planets Mercury always appears close to the sun when observed from Earth. It’s very hard to observe. Mercury, unlike the moon, does not have a synchronous orbit. Its orbital period is 88 days while its rotational period is 58.6 days. - This was discovered via sending radio pulses and analyzing them with the Doppler Effect Mercury is tidally locked even though its orbit is not synchronous. For every two orbits around the sun, mercury rotates three times. Thus, Mercury has a 3:2 spin-orbit resonance (ratio of relating periods) - The Moon has a 1:1 spin-orbit resonance This is caused by the tidal force between the Sun and Mercury. - 17x stronger than the force between the Sun and Earth - Tidal bulge aligns with perihelion and aphelion in 3:2 ratio 3:2 spin-orbit ration gives Mercury a solar day of 176 days, which is two Mercury years. The solar day is very strange on Mercury. The Sun rises in the east, goes back east and sets, then rises again to eventually set in the west. Mercury’s Surface Has a highly cratered surface that are less densely packed than the Moon’s surface. - Has gently rolling intercrater plains that cover 40% of the surface. The oldest surface. Scarps/Rupes: Very long and high cliffs that stretch across the surface - Named after ships - Formed from the planet’s shrinkage Hollows: Deep pits with very steep walls that occur inside or near crater rims and floors. Most likely caused by being so close to the sun, solar erosion. - Unique to Mercury. Caloris Basin: 1400 km basin thought to be caused by an impact. Ringed by mountains 3 km high - Weird Terrain: Rippled territory on the opposite side of the impact zone, most likely caused by the shockwave from the impact. Just like the Moon, Mercury has permanently shadowed craters craters at the poles, which most likely contain water ice. Mercury’s Interior - Extraordinarily large iron core: 2100 km (~80% of diameter) - Thin and iron-poor mantle and crust: Top 400km Rotational inertia indicates an iron- sulfide layer outside the liquid iron core. Evolution of Mercury 1. After forming, Mercury melted and separated into layers. 2. Cooled down slower than the Moon, and thus has a thinner crust. This lead to molten flooding, and the formation of intercrater plains 3. Mercury shrank as it cooled, causing Scarps/Rupes to form across the surface.


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Kyle Maynard Purdue

"When you're taking detailed notes and trying to help everyone else out in the class, it really helps you learn and understand the I made $280 on my first study guide!"

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."


"Their 'Elite Notetakers' are making over $1,200/month in sales by creating high quality content that helps their classmates in a time of need."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.