• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Heliocentric Model by Copernicus
Heliocentric Model by Copernicus

... • Synodic period: the time that elapses between two consecutive identical configurations as seen from the Earth – e.g., from one opposition to the next for superior planets – e.g., from one greatest eastern elongation to the next for inferior planets ...
Solar System
Solar System

...  Galaxy is the result of more than billions of star combining themselves into shapes that is now known as galaxy. It is a collection of stars, gas, and dust combine together because of gravity. One of the galaxies is The name Milky Way galaxy came from the name milky, which means the glowing band i ...
lecture2
lecture2

... Planets – for example Mars – usually move against the stars in an easterly direction, but about once per year, reverse and move retrograde in westerly direction for a while before reverting to standard easterly motion. Also Mercury and Venus are never found far from the Sun – with circular orbits ar ...
Astronomy Readings Version 2/10/2003
Astronomy Readings Version 2/10/2003

... her birthday. Think of how a spinning top’s stick describes a small circle in the air – this is called precession. The Earth’s axis also precesses, taking 26,000 years to complete a cycle, or about one degree every 72 years. This means that the places on our orbit around the Sun where the solstices ...
The Earth and the Universe
The Earth and the Universe

... Motions of the Earth-Moon system – Moon's period of rotation about its axis and its revolution around Earth are the same, 27 days • Causes the same lunar hemisphere to always face Earth • Causes high surface temperature on the day side of the Moon ...
Chapter 13 section 2
Chapter 13 section 2

... closer to Earth than other stars. Light from the Sun reaches Earth in about eight minutes. Light from other stars takes many years to reach Earth. The Sun is unusual in one way. It is not close to any other stars. Most stars are found in groups of two or more stars that orbit each other. Stars can a ...
eta carinae – nature`s own hadron collider
eta carinae – nature`s own hadron collider

... ETA CARINAE IS ONE OF THE MOST MASSIVE STARS KNOWN. IT IS AROUND 100 SOLAR MASSES. THE UPPER LIMIT OF STAR SIZE IS THOUGHT TO BE AROUND 150 SOLAR MASSES. BECAUSE OF ITS SIZE, AND THE HIGH ENERGIES PRODUCED BECAUSE OF GRAVITY, IT IS UNSTABLE. ...
Basic Astronomy Note - Mr. Dewey – Grade 7/8
Basic Astronomy Note - Mr. Dewey – Grade 7/8

... Jupiter, Saturn, Uranus, Neptune: These are gas giants with no solid surface although there may be rocky cores. If the Earth were a golf ball, Jupiter would be a basketball. The Great Red Spot on Jupiter is a hurricane that has been raging for hundreds of years. Three Earth’s could fit inside the st ...
The Solar System Information Pack
The Solar System Information Pack

... reach out and touch them. It can be used not only as a teaching aid about the Space Station, but also to inspire young learners imaginations, give them a love of science and to stimulate their curiosity to want to find out more about our Solar System. Session: ‘Space and Planets’ The aim of this ses ...
Planetary Cycles
Planetary Cycles

... any year in the future, we look up the Ephemeris 19 (or multiples of 19) years earlier. For instance, 1930 gives the Moon’s positions in 1949; 1925 for 1944; 1976 for 1995. Where will the full moon be in October, year 2000? The Ephemeris for 1924 can tell you. The total lunar eclipse of September 27 ...
Nine Planets and Counting
Nine Planets and Counting

... on Earth. Send for the booklet and share it with students. 8. Many students hear that Neptune and Pluto switch orbits. This is a misconception. Pluto’s orbit is elliptical and tilted which occasionally carries Pluto inside the orbit of Neptune. The two planets are still billions of miles apart. Chal ...
File - Mr. Gray`s Class
File - Mr. Gray`s Class

... radiation and material from the sun. • Solar Flares usually only last a few minutes, but can sometimes last a few hours. ...
Mercury - alexanderscience8
Mercury - alexanderscience8

... My Very Eager Mother Just Served Us Nachos (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune) ...
Chapter 11 - Astronomy
Chapter 11 - Astronomy

... 2. Sunspots are about 1,500 K cooler than the surrounding photosphere. Thus they are about 3 times less bright than their surrounding region. 3. The explanation for sunspots involves the Sun’s magnetic field. The strength of this field can be measured using the Zeeman effect (the splitting of spectr ...
© The Multi Taskin Mom | http://www.themultitaskinmom.com
© The Multi Taskin Mom | http://www.themultitaskinmom.com

... Cut out each card on the black lines. Hole punch each black dot in the upper left corner of each card. Laminate cards as per your laminators directions. Cut cards from laminate and re-punch holes. ...
instructor notes: week 2
instructor notes: week 2

... motion of the Moon about Earth, and, to a small extent, the gravitational effect of the Sun and the Moon on the Earth’s axis of rotation. 2. The motions of the Earth produce a fundamental frame of reference for stellar observations. ...
Document
Document

... The other planets of the solar system lie approximately but not exactly on the ecliptic: their orbits lie on planes which are at an angle to the ecliptic plane. This angle is called their orbital inclination i. The Earth’s orbit is also not perfectly circular: it is an ellipse, whose deviation from ...
Planets - burnsburdick11
Planets - burnsburdick11

... • Earth is the only planet that humans can live on. This is only planet that is known to have life. Earth is the only planet with water. This planet is very similar in size to Venus. This has four parts of the interior, the crust, the mantle, the outer core, and the inner core. This one of the two p ...
The Planets
The Planets

... terror\dread and Phobos which means panic\fear they were both discovered in 1877 by Asaph hall and they are actually lost asteroids. ...
Problems in Chapter 13
Problems in Chapter 13

... Problems in Chapter 13 Worked out for Geology/Physics 360 ...
navigation - Claire Lambe Home
navigation - Claire Lambe Home

... The result is about 15% too large in comparison to modern measurement, but his is extremely good considering the assumptions and the equipment with which the observations were made. The second known determination was made by Poseidonus (1st Century BC)). He used the distance between Alexandria and R ...
Chapter 3 The Science of Astronomy
Chapter 3 The Science of Astronomy

... the European Renaissance when at the fall of Constantinople (Istanbul) in 1453, Eastern scholars headed west to Europe. ...
Prominences in H alpha and He II Spectrum of the Sun
Prominences in H alpha and He II Spectrum of the Sun

... There are a lot of solar space telescopes. Even though the Sun is the closest star to our planet, it is still a big mystery. These telescopes help us very much and are crucial part of studying the Sun as a whole. From OSO (Orbiting Solar Observatories), Skylab and SMM (Solar Maximum Mission) to the ...
1. Heraclides of Pontus
1. Heraclides of Pontus

... Model : Tycho reverted back to a geocentric model. However, he had the planets orbit the sun, but the sun orbited the Earth. He also further complicated it by using epicycles on some of the planets. This model was very complicated. 7. Johannes Kepler – Date: early 1600’s Place: Germany, Austria (Par ...
Origin of Our Solar System
Origin of Our Solar System

... accretionary disk model. The student is expected to: a) analyze how gravitational condensation of solar nebular gas and dust can lead to the accretion of planetesimals and protoplanets; b) investigate thermal energy sources, including kinetic heat of impact accretion, gravitational compression, and ...
< 1 ... 109 110 111 112 113 114 115 116 117 ... 228 >

Tropical year

A tropical year (also known as a solar year), for general purposes, is the time that the Sun takes to return to the same position in the cycle of seasons, as seen from Earth; for example, the time from vernal equinox to vernal equinox, or from summer solstice to summer solstice. Because of the precession of the equinoxes, the seasonal cycle does not remain exactly synchronized with the position of the Earth in its orbit around the Sun. As a consequence, the tropical year is about 20 minutes shorter than the time it takes Earth to complete one full orbit around the Sun as measured with respect to the fixed stars (the sidereal year).Since antiquity, astronomers have progressively refined the definition of the tropical year. The Astronomical Almanac Online Glossary 2015 states:year, tropical:the period of time for the ecliptic longitude of the Sun to increase 360 degrees. Since the Sun's ecliptic longitude is measured with respect to the equinox, the tropical year comprises a complete cycle of seasons, and its length is approximated in the long term by the civil (Gregorian) calendar. The mean tropical year is approximately 365 days, 5 hours, 48 minutes, 45 seconds.An equivalent, more descriptive, definition is ""The natural basis for computing passing tropical years is the mean longitude of the Sun reckoned from the precessionally moving equinox (the dynamical equinox or equinox of date). Whenever the longitude reaches a multiple of 360 degrees the mean Sun crosses the vernal equinox and a new tropical year begins"". (Borkowski 1991, p. 122)The mean tropical year on January 1, 2000, was about 365.2421897 ephemeris days according to the calculation of Laskar (1986); each ephemeris day lasting 86,400 SI seconds. By 2010 this had decreased to 365.2421891 (365 ephemeris days, 5 hours, 48 minutes and 45.14 seconds). This is about 365.242181 mean solar days, though the length of a mean solar day is constantly changing.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report