Miscellaneous announcements… Homework 1 due today by 5:00. Pick up Homework 2; solutions are on the web. Get started on a project soon, if you haven’t.

Slides:

Advertisements

Similar presentations

Earth’s Motion in Space March 1, 2011

Advertisements

Earth, Moon, and Sun.

Earth’s Motions, Solar Radiation, and the Seasons

SEASONS AND THE SUN PATH

Observing and the Sky Astronomy 311 Professor Lee Carkner Lecture 3.

The Sky From Earth. Let’s Step Outside Where are the stars? What direction are we facing?

Constellations. Celestial Sphere Our Point of View.

Roger A. Freedman • William J. Kaufmann III

Earth, Moon, and Sun – Course 3

Sky Motions Diurnal Motion Annual Motion.

Motions of the Night Sky

Seasons and the Angle of Solar Radiation Rotation: the time it takes a planet to rotate (spin) once on its axis. For Earth = 1 day.

THE SKY Sun Cycle and Seasons. Objectives To be able to interpret and apply the term “brightness” to stars (finishing this objective). To be able to describe.

Trivia Question of the Day. Astronomy Picture of the Day Astronomy Picture of the Day.

Astronomical Coordinates Summary

Solar Motion. Label front flap MOTIONS OF THE EARTH -DAY & NIGHT.

Seasons. Position of Ecliptic on the Celestial Sphere Earth axis is tilted w.r.t. ecliptic by 23 ½ degrees Equivalent: ecliptic is tilted by 23 ½ degrees.

SUN & SEASONS UFO Size of Stuff in the Sky Earth  * Eye/brain gauges angular size soccer ball  alone doesn’t give you true size!

Last time: 2.1. Patterns in The Sky: Stars and constellations, TODAY: celestial coordinates 2.2 Seasons,…Precession 2.2 (cont.) The Moon and Eclipses.

© 2010 Pearson Education, Inc. The sky varies as Earth orbits the Sun As the Earth orbits the Sun, the Sun appears to move eastward along the ecliptic.

Announcements Clear sky patrol has not yet started We will start using PRS units this week, make sure that you have one.

Miscellaneous announcements… Pick up graded homework Congratulations to our first winner of the Monty Python Galaxy Song Challenge!

Mastering Astronomy.

Movements of the Earth The Earth’s Motion in Space.

Aim: What are some celestial and terrestrial observations? A. Celestial Object Object – any object observed in the sky during the day or night (ex: stars,

Section One: Earth in Space.  What effects are caused by the motions of Earth and the moon?

Chapter 12 Section 1 Earth in Space. Astronomy is the study of the moon, stars, and other objects in space. Earth moves through space in two major ways:

How do they work together to help life survive? Seasons

Earth in Space Mr. Woodham’s 6 th Grade Earth Science Class.

What causes the Seasons?. The Earth’s orbit Seasons do NOT arise from the distance the Earth is from the Sun but rather as a result of the Earth’s annual.

Earth-Sun Relationships The Reasons for the Seasons.

Quiz #1 Review Thursday, 15 September 2011 I list here the main topics and the main points for each topic. Study also the indicated lecture notes.

Vernal Equinox, the First Day of Spring By Dr. Harold Williams of Montgomery College Planetarium

Earth in Space.

Chapter 23 Sun, Earth, Moon System. Position? Center of the universe? No, the Sun is the center of our solar system; Earth travels around the Sun. Shape?

1 Lecture 29 Measuring Time on Earth Ozgur Unal. 2  What time is it in your hometown at the moment?  What time is it in NYC?

The Daily Motion As the Earth rotates, the sky appears to us to rotate in the opposite direction. The sky appears to rotate around the N (or S) celestial.

Earth in Space 6.E.1.1 Explain how the relative motion and relative position of the sun, Earth and moon affect the seasons, tides,

Constellations come, and climb the heavens, and go, And thou dost see them rise, Star of the Pole! and thou dost see them set, Alone,

Earth-Sun Relationships The Reasons for the Seasons.

Aim: What are some of the results of Earth’s Motions? I. Earth’s Motions A. Rotation (Spinning) 1. Day and Night Why does the sun rise in the east and.

AstroLab-2 Locating Stars in the Sky Merav Opher-Fall 2004.

What are the motions of the Earth?. Earth and the Moon in Space The Earth and the moon are part of the sun’s planetary system. Pulled by the sun’s gravity,

The Sun’s Path. Summer Solstice (approximately June 20-21) North Pole: The North Pole (90 degrees north latitude) receives 24 hours of daylight, as it.

What do we mean when we say: The Earth is Tilted Earth’s Seasons Most globes show the axis tilted But what is the axis tilted with respect to? orbit plane.

CHAPTER 1.1 – EARTH IN SPACE. I. HOW EARTH MOVES Definition of Astronomy: The study of the moon, stars, and other objects in space. Definition of Astronomy:

What is apparent motion? Important to understand what we see and what is actually happening. Apparent motion is what we see from Earth Actual motion is.

Research Experiences for Undergraduates (REU)

Winter Sky – Facing North

Sun’s path review.

November 8,2010 Celestial Motions.

Motions in the sky: The celestial sphere

The HELIOCENTRIC Model

Why do we have seasons?.

Mr. Ahearn Earth Science 2010

The Sun in the Sky Ecliptic is the Sun’s apparent path through the celestial sphere. If you do not have a model of the celestial sphere to bring to class,

Aim: How do we measure time?

1-3 Review Jeopardy!.

What are the motions of the Earth?

World Geography Climates

Click me to see the “real deal”

Cornell Notes 1.2 Seasons September 13, 2017 – Page 15.

Aim: The Sun’s path each Season

APPARENT PATH OF THE SUN

And The Celestial Sphere

And The Celestial Sphere

More Evidence of The Earth’s Motion

And The Celestial Sphere

And The Celestial Sphere

And The Celestial Sphere

Presentation transcript:

Miscellaneous announcements… Homework 1 due today by 5:00. Pick up Homework 2; solutions are on the web. Get started on a project soon, if you haven’t already! Astrophotographers: please see me after class. Questions on motion of the stars? Try out Sky View Café and/or Sky Chart III…

The Sun and the Seasons 6 September 2006

Today: Measuring angles in the sky How the sun moves through our sky Seasons

Measuring Angles

A sunset photo (July)

Equinox sunset

Motion of the Sun On any given day, the sun’s motion is essentially the same as that of a star (rises in the east, sets in the west). The sun’s motion doesn’t quite keep up with the stars: It completes a 360º circle in 24 hours. With respect to the stars, the sun appears to move once a year around a great circle, tipped 23.5º with respect to the celestial equator. In late June (summer solstice), the sun is farthest north; in late December (winter solstice), the sun is farthest south. In late March and September (equinoxes), it’s on the celestial equator.

Motion of the Sun Facing south

Motion of the Sun Sun’s apparent path among the stars is called the ecliptic

Seasons SummerWinter (A one-square-meter surface, directly facing the sun, receives about 1000 watts of power.)