APOD Wall Calendar 2015 General: All Topics
... Explanation: If Scorpius looked this good to the unaided eye, humans might remember it better. Scorpius more typically appears as a few bright stars in a well-known but rarely pointed out zodiacal constellation. To get a spectacular image like this, though, one needs a good camera, color filters, an ...
... Explanation: If Scorpius looked this good to the unaided eye, humans might remember it better. Scorpius more typically appears as a few bright stars in a well-known but rarely pointed out zodiacal constellation. To get a spectacular image like this, though, one needs a good camera, color filters, an ...
... 1. Why is Uranus considered a “gas giant” ? Uranus is considered a gas giant because it is entirely composed of gas. 2. What is Uranus atmosphere mostly made up of? Uranus atmosphere is mostly made up of hydrogen. 3. What is the name of the gas that makes Uranus seem blue-green? The name of the gas ...
ASTR 101 Scale of the Universe: an Overview
... 1014 solar masses So many galaxies are close together, some are colliding (as seen in the image) ...
... 1014 solar masses So many galaxies are close together, some are colliding (as seen in the image) ...
Issue number 138 - spring 2011
... planet will continue to evolve in time. You wish to learn more? NASA provides a very nice website dedicated to the Kepler Mission. In addition to a collection of information about the mission, you will find sections on multimedia and education with a range of animations, movies, and classroom activi ...
... planet will continue to evolve in time. You wish to learn more? NASA provides a very nice website dedicated to the Kepler Mission. In addition to a collection of information about the mission, you will find sections on multimedia and education with a range of animations, movies, and classroom activi ...
SOLAR ECLIPSES
... Earth are elliptic, Sun and Moon’s apparent dimensions (noticed on the Earth) vary a little with time. The Moon is about 400 times smaller than the Sun in diameter, but it is about 390 times closer. This makes possible that the two astral bodies could be seen on the Earth under approximately the sam ...
... Earth are elliptic, Sun and Moon’s apparent dimensions (noticed on the Earth) vary a little with time. The Moon is about 400 times smaller than the Sun in diameter, but it is about 390 times closer. This makes possible that the two astral bodies could be seen on the Earth under approximately the sam ...
PLANETS
... solar system. Only a minority of the nearby stars are so young. Even for them, planets— and particularly those in the terrestrial planet/asteroidal region—are faint and are lost in the glare of their central stars. However, when bodies in this zone collide, they initiate cascades of further collisio ...
... solar system. Only a minority of the nearby stars are so young. Even for them, planets— and particularly those in the terrestrial planet/asteroidal region—are faint and are lost in the glare of their central stars. However, when bodies in this zone collide, they initiate cascades of further collisio ...
Neptune - Super Teacher Worksheets
... made up mainly of frozen methane gas. Like the other “gas giant” planets, winds that blow Neptune’s clouds around are very strong. Scientists say winds reach speeds of up to 700 miles an hour (about 1,120 kilometers per hour). Neptune isn’t quite as cold as Uranus, but its largest moon, Triton, is e ...
... made up mainly of frozen methane gas. Like the other “gas giant” planets, winds that blow Neptune’s clouds around are very strong. Scientists say winds reach speeds of up to 700 miles an hour (about 1,120 kilometers per hour). Neptune isn’t quite as cold as Uranus, but its largest moon, Triton, is e ...
Sky Notes - February 2012 - North Devon Astronomical Society
... A second occultation occurs in the early hours of the 20th, when the planet Saturn itself passes in front of another eleventh magniude star, PPM 196966. The star will be seen to emerge from the planet’s southern limb around 2.42am. ...
... A second occultation occurs in the early hours of the 20th, when the planet Saturn itself passes in front of another eleventh magniude star, PPM 196966. The star will be seen to emerge from the planet’s southern limb around 2.42am. ...
Stellar Activity
... either significantly more, or significantly less, active. • A change to either of these states is likely to cause significant changes in the Earth's climate. • Excursions in the luminosity of the Sun from about 0.2% - 0.5% are possible, compared with the observed 0.1% variations ...
... either significantly more, or significantly less, active. • A change to either of these states is likely to cause significant changes in the Earth's climate. • Excursions in the luminosity of the Sun from about 0.2% - 0.5% are possible, compared with the observed 0.1% variations ...
Physics 11 Fall 2012 Practice Problems 7 - Solutions
... amount of energy that we’d need to add to the system to break it apart. Since we’d need to do work on the system to break it apart (ending up with zero total energy), we had to start with a negative energy. The same thing occurs with oppositely-charged particles like protons and electrons, which als ...
... amount of energy that we’d need to add to the system to break it apart. Since we’d need to do work on the system to break it apart (ending up with zero total energy), we had to start with a negative energy. The same thing occurs with oppositely-charged particles like protons and electrons, which als ...
Way Milky the MAPPING
... And like a child on a swing, each time a star crosses the plane of the bar at what’s known as the resonance point, the star gets a little push that moves it a bit higher above the plane, forming the edge of the bulge. Through computer simulations, the researchers demonstrated that between the two ve ...
... And like a child on a swing, each time a star crosses the plane of the bar at what’s known as the resonance point, the star gets a little push that moves it a bit higher above the plane, forming the edge of the bulge. Through computer simulations, the researchers demonstrated that between the two ve ...
Life_Cycle_of_a_Star_Powerpoint
... • The core shrinks and the outer parts expand • It turns red as it is cooling • This phase will last until the star exhausts its remaining fuel. • The pressure of the nuclear reaction is not strong enough to equalize the force of gravity so the star will collapse. ...
... • The core shrinks and the outer parts expand • It turns red as it is cooling • This phase will last until the star exhausts its remaining fuel. • The pressure of the nuclear reaction is not strong enough to equalize the force of gravity so the star will collapse. ...
View PDF
... In the 1960’s Irwin A. Shapiro realised that there was another, and potentially far more accurate, way of testing Einstein’s theory. Shapiro was a pioneer of radar astronomy and realised that the time that a radar pulse would take to travel to and from a planet would be affected if the pulse passed ...
... In the 1960’s Irwin A. Shapiro realised that there was another, and potentially far more accurate, way of testing Einstein’s theory. Shapiro was a pioneer of radar astronomy and realised that the time that a radar pulse would take to travel to and from a planet would be affected if the pulse passed ...
Origin of stars
... some special conditions for star formation and also for a long time period. A cloud of hydrogen gas must be compressed to a sufficiently small size so that gravity dominates. continued ...
... some special conditions for star formation and also for a long time period. A cloud of hydrogen gas must be compressed to a sufficiently small size so that gravity dominates. continued ...
Lecture1.2014_v4 - UCO/Lick Observatory
... southern features: probably stable vortex structures Page 32 ...
... southern features: probably stable vortex structures Page 32 ...
The Orrery - Eli Whitney Museum
... Earth. As those two planets travel around the Sun, the furthest they can appear away from the Sun is when their position in their orbit is perpendicular to Earth. In this position Venus has a maximum angle of 35 degrees from the Sun and Mercury has a maximum angle of 21 degrees. If the Sun was just ...
... Earth. As those two planets travel around the Sun, the furthest they can appear away from the Sun is when their position in their orbit is perpendicular to Earth. In this position Venus has a maximum angle of 35 degrees from the Sun and Mercury has a maximum angle of 21 degrees. If the Sun was just ...
society journal - Auckland Astronomical Society
... ultimate nuclear nightmare, the explosion and fire over 20 years ago at Chernobyl Reactor number four. In the aftermath of Chernobyl experts predicted tens of thousands of deaths from cancer. Those predictions were based on a theory called the Linear No Threshold (LNT) model. ...
... ultimate nuclear nightmare, the explosion and fire over 20 years ago at Chernobyl Reactor number four. In the aftermath of Chernobyl experts predicted tens of thousands of deaths from cancer. Those predictions were based on a theory called the Linear No Threshold (LNT) model. ...
Formation and evolution of the Solar System
The formation of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud. Most of the collapsing mass collected in the center, forming the Sun, while the rest flattened into a protoplanetary disk out of which the planets, moons, asteroids, and other small Solar System bodies formed.This widely accepted model, known as the nebular hypothesis, was first developed in the 18th century by Emanuel Swedenborg, Immanuel Kant, and Pierre-Simon Laplace. Its subsequent development has interwoven a variety of scientific disciplines including astronomy, physics, geology, and planetary science. Since the dawn of the space age in the 1950s and the discovery of extrasolar planets in the 1990s, the model has been both challenged and refined to account for new observations.The Solar System has evolved considerably since its initial formation. Many moons have formed from circling discs of gas and dust around their parent planets, while other moons are thought to have formed independently and later been captured by their planets. Still others, such as the Moon, may be the result of giant collisions. Collisions between bodies have occurred continually up to the present day and have been central to the evolution of the Solar System. The positions of the planets often shifted due to gravitational interactions. This planetary migration is now thought to have been responsible for much of the Solar System's early evolution.In roughly 5 billion years, the Sun will cool and expand outward many times its current diameter (becoming a red giant), before casting off its outer layers as a planetary nebula and leaving behind a stellar remnant known as a white dwarf. In the far distant future, the gravity of passing stars will gradually reduce the Sun's retinue of planets. Some planets will be destroyed, others ejected into interstellar space. Ultimately, over the course of tens of billions of years, it is likely that the Sun will be left with none of the original bodies in orbit around it.