Senior Secondary Science Programme Astronomy through history
... The ancient Greeks tried to explain the change in positions between the celestial bodies and the Earth and the retrograde motion of a planet by using the models of epicycle and deferent. Deferent is the larger circle with the Earth as its centre, while epicycle is the smaller circle centered on the ...
... The ancient Greeks tried to explain the change in positions between the celestial bodies and the Earth and the retrograde motion of a planet by using the models of epicycle and deferent. Deferent is the larger circle with the Earth as its centre, while epicycle is the smaller circle centered on the ...
Iron in Stars
... in the interior of stars through the addition of abundant species. It is almost certainly produced in stars, but not in great enough quantities to compete with iron in terms of being relevant to stellar evolution. The iron/nickel core mass increases until it reaches the Chandrasekhar limit, which is ...
... in the interior of stars through the addition of abundant species. It is almost certainly produced in stars, but not in great enough quantities to compete with iron in terms of being relevant to stellar evolution. The iron/nickel core mass increases until it reaches the Chandrasekhar limit, which is ...
the earth in the solar system
... you more stars, planets and constellations in the sky. In ancient times, people used to determine directions during the night with the help of stars. The North star indicates the north direction. It is also called the Pole Star. It always remains in the same position in the sky. We can locate the po ...
... you more stars, planets and constellations in the sky. In ancient times, people used to determine directions during the night with the help of stars. The North star indicates the north direction. It is also called the Pole Star. It always remains in the same position in the sky. We can locate the po ...
Origins of our Solar System
... form a disc with the Sun in the center. As Temperatures decreased material cooled and condensed from a gas to a solid. Due to the high temperature closer to the Sun different elements solidified. This caused the differing amounts of Fe and Ni in the cores of the Terrestrial planets and the Jovian pl ...
... form a disc with the Sun in the center. As Temperatures decreased material cooled and condensed from a gas to a solid. Due to the high temperature closer to the Sun different elements solidified. This caused the differing amounts of Fe and Ni in the cores of the Terrestrial planets and the Jovian pl ...
Inti didn`t form in the X wind (and neither did most CAIs)
... Outside 15 AU, planets cannot grow before gas dissipates; no gas = no damping of eccentricities ...
... Outside 15 AU, planets cannot grow before gas dissipates; no gas = no damping of eccentricities ...
The Milky Way
... Arrangement of the Planets • Copernicus made observations that allowed him to determine the order of the 5 planets known at that time – Mercury and Venus can only be observed fairly near to the sun at dawn or dusk (their orbits must lie inside of Earth’s orbit, since they are always in the same dir ...
... Arrangement of the Planets • Copernicus made observations that allowed him to determine the order of the 5 planets known at that time – Mercury and Venus can only be observed fairly near to the sun at dawn or dusk (their orbits must lie inside of Earth’s orbit, since they are always in the same dir ...
Understanding Stars
... Constructing a Temperature-Luminosity Diagram In this exercise, your group will calculate the temperature, luminosity, and radius of a number of stars, and add these values to the temperature-luminosity diagram on the board. The accompanying handout gives recipes for calculating, in physical units, ...
... Constructing a Temperature-Luminosity Diagram In this exercise, your group will calculate the temperature, luminosity, and radius of a number of stars, and add these values to the temperature-luminosity diagram on the board. The accompanying handout gives recipes for calculating, in physical units, ...
5Stars_Part_Two
... Helium Fusion: 1. When the core gets hot and dense enough, He begins to fuse: 4He + 4He = 8Be + γ 4He + 8Be = 12C + γ 2. The star contracts slightly and heats up, moving along the horizontal branch 3. Before the He is used up these reactions ...
... Helium Fusion: 1. When the core gets hot and dense enough, He begins to fuse: 4He + 4He = 8Be + γ 4He + 8Be = 12C + γ 2. The star contracts slightly and heats up, moving along the horizontal branch 3. Before the He is used up these reactions ...
Oxygen Isotope Heterogeneity in the Solar System The Molecular
... O-isotopic composition of gas planets • Gas planets – O-isotopic compositions are unknown – Enriched in heavy elements • Water ice and silicate are the major sources • Expected to have 17,18O-enriched composition relative to the Sun ...
... O-isotopic composition of gas planets • Gas planets – O-isotopic compositions are unknown – Enriched in heavy elements • Water ice and silicate are the major sources • Expected to have 17,18O-enriched composition relative to the Sun ...
Ch.15 star formation
... suggest that radiation pressure limits how massive a star can be without blowing itself apart • Observations have not found stars more massive than about 150MSun ...
... suggest that radiation pressure limits how massive a star can be without blowing itself apart • Observations have not found stars more massive than about 150MSun ...
3rd Grade Teacher Guide - The University of Texas at Dallas
... Falling stars can’t be real stars, because all stars, like our own star the Sun, are too big to fall to Earth. Real stars only look small because they are very, very far away. If a student asks about stars falling to Earth, show hold the grapefruit up to the class, and remind them that it is a model ...
... Falling stars can’t be real stars, because all stars, like our own star the Sun, are too big to fall to Earth. Real stars only look small because they are very, very far away. If a student asks about stars falling to Earth, show hold the grapefruit up to the class, and remind them that it is a model ...
Conceptual steps towards exploring the fundamental nature of our Sun
... the growth of instability (Tsytovich, 1970, 1). Plasma microinstabilities are localized, usually high frequency phenomena that cannot be described in MHD but in the kinetic models. In general, the plasma can support electric currents (e.g. Goossens, 2003, 1). Plasmas are extremely complicated physic ...
... the growth of instability (Tsytovich, 1970, 1). Plasma microinstabilities are localized, usually high frequency phenomena that cannot be described in MHD but in the kinetic models. In general, the plasma can support electric currents (e.g. Goossens, 2003, 1). Plasmas are extremely complicated physic ...
Lecture 1: Properties of the Solar System
... Planets and Sun revolve and orbit in a west-to-east direction. The planets obliquity (tilt of rotation axes to their orbits) are small. Uranus and Venus are exceptions. 4. The planets differ in composition. Their composition varies roughly with distance from the Sun: dense, metal-rich planets are in ...
... Planets and Sun revolve and orbit in a west-to-east direction. The planets obliquity (tilt of rotation axes to their orbits) are small. Uranus and Venus are exceptions. 4. The planets differ in composition. Their composition varies roughly with distance from the Sun: dense, metal-rich planets are in ...
Solar flare
... diameter of about 1,390,000 km and its mass is 1.9891x1030 kg. The Solar mass is strongly concentrated towards the centre. The outer convection zone, which extends from immediately below the surface down to r/r ʘ ≈ 0.7, contains only about 1.67% of the total mass. And only about 10% of the mass lies ...
... diameter of about 1,390,000 km and its mass is 1.9891x1030 kg. The Solar mass is strongly concentrated towards the centre. The outer convection zone, which extends from immediately below the surface down to r/r ʘ ≈ 0.7, contains only about 1.67% of the total mass. And only about 10% of the mass lies ...
Teaching How Scientists Use Models with What Makes Up Most of
... and using models is a fundamental practice in science. Scientists use models to investigate objects or processes that happen too slowly, too quickly, or on too small of a scale to observe directly. They also use models to explore phenomena that are too vast, too complex, or too dangerous to study fi ...
... and using models is a fundamental practice in science. Scientists use models to investigate objects or processes that happen too slowly, too quickly, or on too small of a scale to observe directly. They also use models to explore phenomena that are too vast, too complex, or too dangerous to study fi ...
AMUSE-Virgo on the survival of super
... AMUSE-Virgo: latest results 26/100 nuclear super-massive Point-like nuclearX-ray X-raysources source likley detected in 32p/100 black objectsholes ...
... AMUSE-Virgo: latest results 26/100 nuclear super-massive Point-like nuclearX-ray X-raysources source likley detected in 32p/100 black objectsholes ...
The Universe
... •Almost every nebula is hundreds of times bigger than the critical size needed to form a stable star –―Precisely how a section of an interstellar cloud collapses gravitationally into a star…is still a challenging theoretical problem…Astronomers have yet to find an interstellar cloud in the actual pr ...
... •Almost every nebula is hundreds of times bigger than the critical size needed to form a stable star –―Precisely how a section of an interstellar cloud collapses gravitationally into a star…is still a challenging theoretical problem…Astronomers have yet to find an interstellar cloud in the actual pr ...
Black Holes - Troy University
... If an object is small enough, gravity overwhelms pressure and the object collapses. Gravity is so strong that nothing, not even light, can escape. “Radius” of a BH 2 miles for a solar mass 1 inch for an Earth mass ...
... If an object is small enough, gravity overwhelms pressure and the object collapses. Gravity is so strong that nothing, not even light, can escape. “Radius” of a BH 2 miles for a solar mass 1 inch for an Earth mass ...
Supermassive black holes accreting stars through tidal disruption in
... • Measured in (E,J,Jz) phase space by performing scattering experiment. ...
... • Measured in (E,J,Jz) phase space by performing scattering experiment. ...