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ASTRONOMY TODAY » THE IMPORTANCE OF THE STARS We spend the vast majority of our lives indoors. We’re at work, at school, or at home, with activities such as sleeping, watching TV, or having dinner with the family. INTRODUCTION TO THE HISTORY OF ECLIPSES Since the very beginning of history, people have been amazed by what they see when they look up at the sky. Indeed, looking at the celestial sphere without the unpleasant interference of THE MOON, EARTH'S MAJOR SATELLITE The Moon orbits the Earth and is its only significant natural satellite. It is believed that about 4.5 billion years ago, a planet slightly larger than Mars struck the young Earth obliquely and laterdisintegrated.
ECLIPSES FROM ANCIENT TIMES Ho and Hi, the Drunk Astronomers (2137 BCE) Throughout the centuries, Chinese astronomers devoted substantial efforts towards predictingeclipses.
ASTRONOMY TODAY » OBSERVING BY DEGREES Matt H said, October 7th, 2014 @ 7:52 pm “There are 60 arcminutes in one degree, and 60 arcseconds in one arcminute. Going back to the Big Dipper, the stars in the handle named Mizar and Alcor are separated byjust 12 arcminutes.
QUINTESSENCE, ACCELERATING THE UNIVERSE? When it doubt, go back to the basics. That's just what cosmologists have done to explain why our universe seems to be accelerating.. The new buzz word in cosmology these days is 'quintessence', borrowed from the ancient Greeks who used the term to describe a mysterious 'fifth element' - in addition to air, earth, fire and water - which held the moon and stars in place. FAMOUS ECLIPSES OF THE MIDDLE AGES Muhammad's Eclipse (632 CE) The founder of Islam, the prophet Muhammad, was born in Mecca in the Year of the Elephant, CE 569-570. His birth year got its name from an invasion by the Abyssinians, who used elephants in the assault. ASTRONOMY TODAY » DATES OF THE HARVEST MOON Each month’s Full Moon carries various nicknames, and the most well-known of these nicknames is the Harvest Moon. However, theHarvest Moon is
ASTRONOMY TODAYHISTORICAL ECLIPSESASTROPHOTOGRAPHYOLDER BLOG POSTSZODIACAL LIGHTBUYING A TELESCOPE August’s Perseid meteor shower was a good one and testament to that is this great photograph of a Perseid meteorite from 12 August 2015. It was taken by amateur astrophotographer Andrew Davidhazy at 10:30pm EST from a location near Rochester in New York state, USA. ALL ABOUT TELESCOPES: REFRACTORS, REFLECTORS AND MORE A telescope is an optical instrument used to magnify and enhance the view of faraway objects, be they astronomical or terrestrial. Most telescopes fall into one of two main categories: refractor orreflector.
ASTRONOMY TODAY » THE IMPORTANCE OF THE STARS We spend the vast majority of our lives indoors. We’re at work, at school, or at home, with activities such as sleeping, watching TV, or having dinner with the family. INTRODUCTION TO THE HISTORY OF ECLIPSES Since the very beginning of history, people have been amazed by what they see when they look up at the sky. Indeed, looking at the celestial sphere without the unpleasant interference of THE MOON, EARTH'S MAJOR SATELLITE The Moon orbits the Earth and is its only significant natural satellite. It is believed that about 4.5 billion years ago, a planet slightly larger than Mars struck the young Earth obliquely and laterdisintegrated.
ECLIPSES FROM ANCIENT TIMES Ho and Hi, the Drunk Astronomers (2137 BCE) Throughout the centuries, Chinese astronomers devoted substantial efforts towards predictingeclipses.
ASTRONOMY TODAY » OBSERVING BY DEGREES Matt H said, October 7th, 2014 @ 7:52 pm “There are 60 arcminutes in one degree, and 60 arcseconds in one arcminute. Going back to the Big Dipper, the stars in the handle named Mizar and Alcor are separated byjust 12 arcminutes.
QUINTESSENCE, ACCELERATING THE UNIVERSE? When it doubt, go back to the basics. That's just what cosmologists have done to explain why our universe seems to be accelerating.. The new buzz word in cosmology these days is 'quintessence', borrowed from the ancient Greeks who used the term to describe a mysterious 'fifth element' - in addition to air, earth, fire and water - which held the moon and stars in place. FAMOUS ECLIPSES OF THE MIDDLE AGES Muhammad's Eclipse (632 CE) The founder of Islam, the prophet Muhammad, was born in Mecca in the Year of the Elephant, CE 569-570. His birth year got its name from an invasion by the Abyssinians, who used elephants in the assault. ASTRONOMY TODAY » DATES OF THE HARVEST MOON Each month’s Full Moon carries various nicknames, and the most well-known of these nicknames is the Harvest Moon. However, theHarvest Moon is
BASIC ASTRONOMICAL TERMINOLOGY Astronomical Unit. This is slightly less than the mean distance from the Earth to the Sun, approx. 149,597,870.691km or about 93 million miles. The semi-major axis between the Earth and Sun is greater than one AU because one astronomical unit is the measure of an unperturbedcircular orbit.
THE MOON, EARTH'S MAJOR SATELLITE The Moon orbits the Earth and is its only significant natural satellite. It is believed that about 4.5 billion years ago, a planet slightly larger than Mars struck the young Earth obliquely and laterdisintegrated.
ASTRONOMY TODAY: ABOUT THIS SITE Lydia Lousteaux I observe from my property near Columbus, Texas with binoculars and a 5" Celestron GOTO, a gift from a friend. I have authored articles for women's magazines and cook books over a 25 year period, under several pen names, (Lydia Lousteaux is one of them). IDENTIFYING STAR CLUSTERS The Pleiades, the Hyades and the Beehive cluster are all amazing in their own right, but, to pose a straightfoward question: which is which? Imagine that you're separated from any kind of star chart. QUINTESSENCE, ACCELERATING THE UNIVERSE? When it doubt, go back to the basics. That's just what cosmologists have done to explain why our universe seems to be accelerating.. The new buzz word in cosmology these days is 'quintessence', borrowed from the ancient Greeks who used the term to describe a mysterious 'fifth element' - in addition to air, earth, fire and water - which held the moon and stars in place. MARS, THE RED PLANET Mars is the fourth planet from the Sun. It is also the second nearest planet to the Earth and will probably be the first planet visited byhumans.
VIEWING AN AURORA (THE NORTHERN LIGHTS) Many aspects of stargazing make it seem like we live in a clockwork universe: the positions of the planets, solar and lunar eclipses, and even the changing of ECLIPSES FROM ANCIENT TIMES Augustus' Eclipse (14 CE) Soon after the death of Augustus, Tacitus mentions a lunar eclipse, which has been identified with the eclipse of September 27, 14 CE.QUANTUM GRAVITY
The gist of this is that the gamma-ray bursts that Fermi detects will be powerful enough and distant enough to see the highest of the high-energy photons traveling slightly more slowly than lower-energy photons, weighed down by the effect of quantum gravity. INTERVIEW WITH THE CREATORS OF THE CLEAR SKY CLOCK Introduction Today we are talking to two very data-oriented gentlemen. The first is Allan Rahill, a most avid and accurate forecaster of clouds and clear skies, particularly for amateur astronomers. ASTRONOMY TODAYHISTORICAL ECLIPSESASTROPHOTOGRAPHYOLDER BLOG POSTSZODIACAL LIGHTBUYING A TELESCOPE August’s Perseid meteor shower was a good one and testament to that is this great photograph of a Perseid meteorite from 12 August 2015. It was taken by amateur astrophotographer Andrew Davidhazy at 10:30pm EST from a location near Rochester in New York state, USA. ASTRONOMY TODAY » THE IMPORTANCE OF THE STARS Being in a place with very little light pollution on a clear night makes you remember the importance of the stars. They are the only things beckoning to you on a dark night, and their brightness seems more powerful and brilliant, like ice drops reflecting the Sun, as compared to when they swim in the muted grayness of a suburban orurban sky.
BASIC ASTRONOMICAL TERMINOLOGY Astronomical Unit. This is slightly less than the mean distance from the Earth to the Sun, approx. 149,597,870.691km or about 93 million miles. The semi-major axis between the Earth and Sun is greater than one AU because one astronomical unit is the measure of an unperturbedcircular orbit.
IDENTIFYING STAR CLUSTERS The Pleiades is also known by its Messier catalogue number M45. Although nicknamed the Seven Sisters ( map identifying stars of the Pleiades ), M45 is actually formed by over 100 stars. It's located at RA 3:47, DEC +24.07 with a visual brightness of 1.6, and apparent dimension of 110.0 arcminutes. The Hyades, also known as Melotte 25,can be
ALL ABOUT TELESCOPES: REFRACTORS, REFLECTORS AND MORE All about telescopes: refractors, reflectors and more. A telescope is an optical instrument used to magnify and enhance the view of faraway objects, be they astronomical or terrestrial. Most telescopes fall into one of two main categories: refractor or reflector. Also available are Schmidt-Cassegrain telescopes - a combination ofreflector and
INTRODUCTION TO THE HISTORY OF ECLIPSES Introduction to the History of Eclipses. Since the very beginning of history, people have been amazed by what they see when they look up at the sky. Indeed, looking at the celestial sphere without the unpleasant interference of city lights is magnificent. It can sometimes mesmerise us with a deep desire of traveling out to thesecelestial
ASTRONOMY TODAY » OBSERVING BY DEGREES Dave said, May 2nd, 2017 @ 12:58 pm. Allen. the the circumference of a circle is 360 degrees, and is defined as 2 x pi x radius and the surface area of a sphere is 4 x pi x (radius)^2. If. 2 x pi x radius=360 degrees. then. one radius=360 / (2 x pi)= 57.2958 degrees.plug
MARS, THE RED PLANET Mars, the red planet. Mars is the fourth planet from the Sun. It is also the second nearest planet to the Earth and will probably be the first planet visited by humans. It has an orbital period equal to 687 Earth days and a rotational period equal to 24hrs 37mins and 22.6 seconds. Therefore there are 668 Martian days in a Martian Year. ASTRONOMY TODAY » DATES OF THE HARVEST MOON The autumnal equinox in the Northern Hemisphere falls on September 22 or 23 each year. Here are some past and future dates of the Harvest Moon: • October 4, 2009. • September 23, 2010. • September 12, 2011. • September 29, 2012. • September 19, 2013.QUANTUM GRAVITY
Gamma-ray bursts were discovered in the late 1960s, decades after the concepts of General Relativity and Quantum Mechanics first spiced the physics lexicon. General Relativity accounts for gravity, the force that acts across large scales. Quantum Mechanics, part of the Standard Model, describes the behavior of the other three fundamental forces ASTRONOMY TODAY'S GUIDE TO THE NIGHT SKY Noctilucent clouds as seen over the Netherlands Credit: Hrald On July 7 after sunset, the Moon is a little more than one degree below Saturn.Use a telescope to easily spot Saturn with its rings and largest moon Titan, our Moon and its craters, and the wonderfully named Zubenelgenubi to the Moon's right. BASIC ASTRONOMICAL TERMINOLOGY Astronomical Unit. This is slightly less than the mean distance from the Earth to the Sun, approx. 149,597,870.691km or about 93 million miles. The semi-major axis between the Earth and Sun is greater than one AU because one astronomical unit is the measure of an unperturbedcircular orbit.
THE MOON, EARTH'S MAJOR SATELLITE The Moon orbits the Earth and is its only significant natural satellite. It is believed that about 4.5 billion years ago, a planet slightly larger than Mars struck the young Earth obliquely and later disintegrated. A small portion of the planet's original mass, trapped in orbit around the Earth, re-amalgamated to form the Moon. ECLIPSES FROM ANCIENT TIMES Eclipses from Ancient Times - Part One. Ho and Hi, the Drunk Astronomers (2137 BCE) Throughout the centuries, Chinese astronomers devoted substantial efforts towards predicting eclipses. However, like all similar efforts prior to the Renaissance, this could only be by empirical research. The earliest record of a solar eclipse comes fromancient
METEOR SHOWERS VISIBLE EACH MONTH The last two months of the year each have two fairly good meteor showers. The Taurid meteor shower peaks from November 4 to 7 with a ZHR of 8 from the constellation Taurus. Comet Encke is the parent of this shower. The next shower is the Leonids, which rains down between November 15 and 19 with a peak around November 17/18. VENUS, THE HOTTEST PLANET IN THE SOLAR SYSTEM Venus, the hottest planet in the solar system. Venus is the second closest planet to the Sun. Telescopes reveal little about the planet due to global cloud cover. Venus' mass and volume are quite similar to Earth's (Venus' mass is 81.5% of Earth's and its volume is 86% of Earth's). Its almost circular orbital period is 224.7 Earth days. MARS, THE RED PLANET Mars, the red planet. Mars is the fourth planet from the Sun. It is also the second nearest planet to the Earth and will probably be the first planet visited by humans. It has an orbital period equal to 687 Earth days and a rotational period equal to 24hrs 37mins and 22.6 seconds. Therefore there are 668 Martian days in a Martian Year. METEORS - SHOOTING STARS - ASTRONOMY TODAY Meteors, or shooting stars as they are more commonly known, are the streaks of light produced when a meteoroid burns up in the Earth's atmosphere. It looks like a star falling towards us as it momentarily flashes above us. The meteoroids, which produce the meteors, are dust and rocks in space. Comets and asteroids are the two main sources. NEPTUNE, GAS GIANT WITH GREAT DARK SPOT Neptune is the fourth largest of the planets in the solar system and eighth major planet in order of increasing distance from the Sun. It is similar in size and structure to its neighbour Uranus. FAMOUS ECLIPSES OF THE MIDDLE AGES Famous Eclipses of the Middle Ages - Part One. Muhammad's Eclipse (632 CE) The founder of Islam, the prophet Muhammad, was born in Mecca in the Year of the Elephant, CE 569-570. His birth year got its name from an invasion by the Abyssinians, who used elephants in the assault. SKY GUIDE OBSERVING HIGHLIGHTS JULY TO SEPTEMBER » » Summer is the season for NOCTILUCENT CLOUDS Full Moon and Perigee Moon converge for a SUPERMOON Track down two asteroids, CERES AND VESTA Planetary pairings of SATURN AND MARS, JUPITER AND VENUS The PERSEID meteor shower peaks The EQUINOX restores balance to days and nights MARS meets its rival, ANTARES An early HARVEST MOON occurs in September LOOK OUT FOR NOCTILUCENT CLOUDS FULL DETAILS IN THE SKY GUIDE » » PERSEID METEORITE BLAZING ACROSS THE SKY Posted by MARC on September 10th, 2015 Perseid Meteorite shooting across the night sky – August 2015 August’s Perseid meteor shower was a good one and testament to that is this great photograph of a Perseid meteorite from 12 August 2015. It was taken by amateur astrophotographer Andrew Davidhazy at 10:30pm EST from a location near Rochester in New York state, USA. The photo was taken with a Canon 5D Mark II (on a tripod) which had been set up to take 15 second long exposures with a 50mm lens at a large lens opening (f/2) and high sensor speed (of 2000). Notwithstanding the light pollution that there was to contend with, Read the rest of this post … Comment on this post (1 so far) CLOSEST STARS TO THE SUN Posted by KELLY on November 29th, 2014 The Sun, our nearest star, by John Chumack When snow covers the ground and we shiver from scant Sun rays and long nights, it’s not hard for our thoughts to turn to our nearest star. One cure for wintertime blues is to travel south to a place where the Sun shines a bit longer and warmth still bakes the Earth. But for the astronomically minded, sometimes we think about getting closer to the Sun in other ways. The Sun is the closest star to Earth, even though sometimes it feels completely absent. But what are the other stars close to Earth and why can’t they help keep our toes from freezing? I can’t really help you with the second question, but for the first question, we can explore all the close stars to Earth. Read the rest of this post … Comment on this post (1 so far) MY OBSERVING WISH LIST Posted by KELLY on October 30th, 2014 Aurora Photo by John Chumack All amateur astronomers have a wish list of objects they would like to observe. When they first start observing, the list is modest, with objects such as the moons of Jupiter, the rings of Saturn, craters on the Moon, the Andromeda Galaxy, the Orion Nebula, and so forth. By this point in my life, I have seen these objects multiple times. They are beautiful and always worth a look, but they certainly wouldn’t be something to put on my wish list anymore. My current wish list is a bit more exotic. Some of the items I have seen but want to see again, while others I haven’t seen and still others I will never see. But they make my wish list nonetheless. Read the rest ofthis post …
Comment on this post (2 so far) AN EARLY MORNING ECLIPSE Posted by KELLY on October 10th, 2014 A Partial Lunar Eclipse during Moonset The total lunar eclipse was going to occur from about 5:30 to 6:30 on Wednesday morning. My alarm was set for 6:00, like usual, and the forecast was for perfectly clear skies. I was awake fifteen minutes before my alarm but patiently waited until six o’clock, because the only upstairs windows that face west where the eclipsed Moon was setting are in my children’s bedrooms. I was not awake enough to go downstairs nor mean enough to wake them unnecessarily early. At 6:00 I walked into my son’s bedroom and raised his blinds, like I do every morning to wake him. This has become less effectual as the school year draws on and it’s still dark in the morning. This morning there wouldn’t even be moonlight to wake him, as the fully eclipsed Moon was shining dimly with a gray pallor. Read the rest of this post … Comment on this post - be the first! LOSING THE COMET BUT WINNING THE RING Posted by KELLY on September 16th, 2014 The Ring Nebula, M57 in Lyra, by John Chumack When the clouds finally cleared from overhead, they were replaced by clouds upon the ground. I stood in my driveway looking up at the stars arrayed above while fog swirled around my feet. These are not ideal conditions for observing, but at least the stars can be seen, whereas the clouds had been blocking all manner of wonders, including the recent aurora, for nights on end. Read the rest of this post … Comment on this post (1 so far) TARGETING SAGITTARIUS Posted by KELLY on August 31st, 2014 M8, The Lagoon Nebula in Sagittarius, by John Chumack Sagittarius is an incredibly rich area for stargazing, but it’s only easily viewable for a short time. Summer is the best season for observing, but even then it stays low on the southern horizon. Sagittarius is an easy constellation even for children to spot because it has a grouping of stars that looks almost exactly like a teapot. Read the rest of this post … Comment on this post - be the first! OBSERVING SUMMER CONSTELLATIONS Posted by KELLY on July 28th, 2014 The Milky Way and Vega by John Chumack On summer evenings as adults sit around bonfires and kids run in the yard playing flashlight tag, eyes turn skyward. Teach your friends and family the most important summer constellations with this handy guide on what star formations are overhead. Read the rest of this post … Comment on this post - be the first! CROSSING OFF THE BUCKET LIST: ZODIACAL LIGHT Posted by KELLY on May 27th, 2014 The Zodiacal Light looks pyramidal shaped from horizon stretching upward. Credit: ESO/Y. Beletsky Amateur astronomers never really take a vacation from stargazing. And in fact, sometimes vacations provide for the best stargazing. Over spring break this year my family and I did a tour of the national parks, starting and ending our vacation in Las Vegas, one of the most light polluted locations on Earth. But McCarran International airport made for a good spot to begin our travels first to Utah’s national parks, then to Great Basin National Park in Nevada along the loneliest highway in America, and finally to Death Valley National Park in California, before the short jog back to Las Vegas. Read the rest ofthis post …
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