Did You Know… …That the Earth wobbles on its axis…?

Slides:

Advertisements

Similar presentations

The Earth’s Movement.

Advertisements

Chapter 2 Discovering the Universe for Yourself

Celestial Sphere Stars seem to be on the inner surface of a sphere surrounding the Earth.

Observing Astronomy 315 Professor Lee Carkner Lecture 3.

Prologue Welcome to PH109 Exploring the Universe Dr. Michael L. Cobb Fall, 2003.

Constellations. Celestial Sphere Our Point of View.

Physics 202: Introduction to Astronomy – Lecture 2 Carsten Denker Physics Department Center for Solar–Terrestrial Research.

Astronomy 1010 Planetary Astronomy Fall_2014 Day-9.

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

Question 1 Constellations appear to move across the sky at night because 1) the Earth orbits the Sun. 2) the Moon orbits the Earth. 3) stars are in constant.

Constellations Constellations -- groups of stars named by ancient cultures to honor gods, animals, legends, etc. They provide us with ways to recognize.

The Celestial Sphere The 88 official constellations cover the celestial sphere. If you do not have a model of the celestial sphere to bring to class, you.

Grab your text book Chapter 1 Astronomy Today 7th Edition

Grab your text book Chapter 1 Astronomy Today 7th Edition

Constellations What is a constellation? A group of stars that seems to form a picture.

Sponge: What two factors cause the seasons on Earth?

Retrograde Motion You’re going the wrong way!. History of Retrograde Motion Ancient Greeks noticed that certain celestial objects changed their locations.

Charting the Heavens The gears in the big machine.

The Seasons, Solstices and Equinoxes

What time is it? Depends on where you are on the Earth! Time zones ensure that the noon is really noon, i.e. sun is at highest point To avoid confusion,

You Know Astronomy! Observing the motions of Sun, Moon, Stars Observing the motions of Sun, Moon, Stars Observing the appearance of the Sun, Moon, Stars.

Constellations A constellation is a region of the sky.

Constellations & Motions in Our Sky

Evening Classes Week One

Constellation Notes. Constellations Day 1 Objective: You will use critical thinking skills in order to differentiate between astronomy and astrology.

The sky Our place in space ConstellationsMeasurement Celestial Sphere Polaris and precession $ 200 $ 200$200 $ 200 $ 200 $400 $ 400$400 $ 400$400.

31 Aug 2000ASTR103, GMU, Dr. Correll1 Ch 1--Discovering the night sky.

Motions of the Earth Our goals for learning: What are the main motions of the Earth in space? How do we see these motions on the ground? How does it affect.

Alta High Astronomy Intro: Astronomy A stellar course to be in!

EA: Ecliptic & Annual Motion Review Questions Sept 1, 2009.

EA: Ecliptic & Annual Motion Review Questions January 10, 2011.

The Earth, Sun, and Moon.

1. annular eclipse - the moon is not close enough to the earth to completely block the sun, so the sun rings the moon.

Motions of the Earth and Sky I. Outline for Today History: flat vs. spherical earth Map of the sky Constellations Diurnal and Yearly Motion The seasons.

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.

Exploring the Heavens. Humans have always looked up at the sky and wondered.

Astronomy Picture of the Day

Chapter 4 - Space Lesson 17: Earth Movements – Rotation and Revolution.

Astronomy 105 ä Student Information Sheet ä Class Syllabus ä Lab Syllabus ä Course Supplies ä Text ä Lab Manual ä Scantron 882-ES ä Flashlight with red.

Mastering Astronomy.

Earth, Moon, and Sun Chapter 19. Earth in Space 19-1 Astronomy study of objects beyond the Earth’s atmosphere. One of the oldest sciences Ancient people.

Phases of the Moon Reasons for the Seasons Constell- ations Eclipses Celestial Sphere Using terms $ 200 $ 200$200 $ 200 $ 200 $400 $ 400$400 $ 400$400.

Astronomy 1010 Planetary Astronomy Fall_2015 Day-10.

Yesterday in class we learned a little about constellations, but we didn’t take notes. Now you will take some notes!

How do they work together to help life survive? Seasons

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.

1.Stars move from east to west over the course of the night 2.Change slightly from one night to the next 3.However, their relative positions remain.

The sky Our place in space ConstellationsMeasurement Celestial Sphere Polaris and precession $ 200 $ 200$200 $ 200 $ 200 $400 $ 400$400 $ 400$400.

Along the Ecliptic Constellations, Solstices, Equinoxes, Tropics And the Zodiac.

Seasonal Motion. Daily and yearly motion intertwined Solar vs Siderial Day –Earth rotates in 23 h 56 m –also rotates around sun  needs 4 min. to “catch.

Charting the Heavens The gears in the big machine.

Daily and yearly motion intertwined Solar vs Siderial Day –Earth rotates in 23 h 56 m –also rotates around sun  needs 4 min. to “catch up” Consequence:

Constellations pg. 65. Constellation section of the sky with a recognizable star pattern. 88 listed 48 from Ptolemy.

Phases of the Moon Reasons for the Seasons Constell- ations Eclipses Celestial Sphere Using terms $ 200 $ 200$200 $ 200 $ 200 $400 $ 400$400 $ 400$400.

Our Location on the Earth North South EastWest North South East you are here West.

Chapter 4: Rising & Setting Stars © BRIEF

We are here on earth to do good for others. What the others are here for, I don't know. W. H. Auden.

Research Experiences for Undergraduates (REU)

Brooklyn School for Law and Technology Mr. Ross Brown

© 2017 Pearson Education, Inc.

Winter Sky – Facing North

Unit 1 Physics Detailed Study 3.1

The Earth, Sun, and Moon.

Motions of Earth, the Moon and Planets

ASTRO UNIT 1 REVIEW.

And The Celestial Sphere

And The Celestial Sphere

And The Celestial Sphere

And The Celestial Sphere

And The Celestial Sphere

Presentation transcript:

Did You Know…

…That the Earth wobbles on its axis…?

It’s called…

Precession

It’s called… Precession (Both Weebles and the Earth wobble, but neither falls down…)

Earth completes 1 full cycle of wobble every 26,000 years.

Like This….

Notice that the direction the North Pole points is changing.

Precession- The wobbling motion of the Earth on its axis.

1 wobble takes 26,000 years

Question

Which star will be the North Star in the year 14,000 AD? Question

Answer

Answer Vega !

Look Again

Vega – the polar star in 14,000 AD

Look Again

The Zodiac

WestEast

Planet Moon WestEast

Planet Moon WestEast

Planet Moon The Zodiac- The narrow belt, 18 o wide, which includes the paths of the planets and the Moon. WestEast

Planet Moon The Zodiac- The narrow belt, 18 o wide, which includes the paths of the planets and the Moon. The Ecliptic lies at the center of the Zodiac WestEast

Planet Moon The Zodiac- The narrow belt, 18 o wide, which includes the paths of the planets and the Moon. The Ecliptic lies at the center of the Zodiac WestEast

Planet Moon The Zodiac- The narrow belt, 18 o wide, which includes the paths of the planets and the Moon. The Ecliptic lies at the center of the Zodiac WestEast

Planet Moon WestEast

Planet Moon This is what we see when viewing the Zodiac from Earth. WestEast

Planet Moon WestEast

Planet Moon WestEast But when viewing from space,

But when viewing from space, then the Zodiac looks like this:

The Zodiac

The Ecliptic

The Zodiac represents the middle belt of the Celestial Sphere.

The belt is divided into 12 equal segments,

The belt is divided into 12 equal segments, each called a “sign” of the Zodiac.

A “Sign of the Zodiac” is only an area of space in the sky.

Don’t confuse the “Signs of the Zodiac” with the Constellations of the Zodiac.

Since the entire circle has 360 o, then

Since the entire circle has 360 o, then each sign of the Zodiac is 30 o wide.

30 o wide

Since the entire circle has 360 o, then each sign of the Zodiac is 30 o wide.

The Zodiac has its beginning with the Sign of Aries.

The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

Vernal Equinox The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

Vernal Equinox The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

Vernal Equinox

The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring. Vernal Equinox

The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

Vernal Equinox

The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

Vernal Equinox

The Sign of Aries is defined as the portion of the daytime sky over the Earth on the first day of spring.

Vernal Equinox

Of course, each Sign of the Zodiac will contain stars.

Taurus AriesPisces Aquarius Vernal Equinox Of course, each Sign of the Zodiac will contain stars.

Taurus AriesPisces Aquarius Vernal Equinox

Taurus AriesPisces Aquarius Vernal Equinox Shown are four Constellations of the Zodiac, located in four “Signs of the Zodiac”.

Taurus AriesPisces Aquarius Vernal Equinox

Taurus AriesPisces Aquarius Vernal Equinox Due to precession of the Earth on its axis, the Constellations no longer match the Signs of the Zodiac.

For Example…

The Sign of Aries now contains the Constellation of Pisces

Here’s why…

Vernal Equinox

Taurus AriesPisces Aquarius Vernal Equinox

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

Taurus Aries Pisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

Taurus Aries Pisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

Taurus Aries Pisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C. In 100 B.C., the Sign of Aries contained the Constellation of Aries.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 100 B.C.

Taurus AriesPisces Aquarius

Taurus AriesPisces Aquarius

Taurus AriesPisces Aquarius

Taurus AriesPisces Aquarius Vernal Equinox

Taurus AriesPisces Aquarius Vernal Equinox

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries Today

Taurus AriesPisces Aquarius …But due to precession, today the Vernal Equinox occurs a month earlier. Vernal Equinox Sign of Aries Today

Taurus AriesPisces Aquarius Vernal Equinox Today Sign of Aries

Taurus AriesPisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Sign of Aries Today

Taurus Aries Pisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

Taurus AriesPisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

Taurus Aries Pisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

Taurus AriesPisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

Taurus Aries Pisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

Taurus AriesPisces Aquarius Vernal Equinox …and the Sign of Aries now contains the Constellation of Pisces Today Sign of Aries

Taurus AriesPisces Aquarius Vernal Equinox Today

Taurus AriesPisces Aquarius

Taurus AriesPisces Aquarius

Taurus AriesPisces Aquarius

Taurus AriesPisces Aquarius Vernal Equinox

Taurus AriesPisces Aquarius Vernal Equinox

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. As the Earth continues to precess on its axis,

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. As the Earth continues to precess on its axis, the Vernal Equinox will continue to shift.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. This will also cause the Sign of Aries to shift.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D. In the year 4200 A.D., the Sign of Aries will contain the Constellation of Aquarius.

Taurus AriesPisces Aquarius Vernal Equinox Sign of Aries 4200 A.D.

Taurus AriesPisces Aquarius

Taurus AriesPisces Aquarius So when will the Sign of Aries again contain the Constellation of Aries?

Taurus AriesPisces Aquarius

Taurus AriesPisces Aquarius Answer: in 24,000 more years.

Taurus AriesPisces Aquarius

Constellations of the Zodiac

Which constellation is in the daytime sky in May?

Constellations of the Zodiac Which constellation is in the daytime sky in May?

Constellations of the Zodiac Which constellation is in the daytime sky in May?

Constellations of the Zodiac Which constellation is in the daytime sky in May?

Constellations of the Zodiac Which constellation is in the daytime sky in May?

Constellations of the Zodiac Which constellation is in the daytime sky in May? Answer: Aries