If a Supernova Explodes in the Distant Universe, How Will it Look to Us?
In the enlarged inset view of the galaxy, the arrows point to the multiple copies of the exploding star, dubbed Supernova Refsdal, located 9.3 billion light-years from Earth. Vacation Spots to Learn About Astronomy Astronomers and Space Explorers Bring a Love of the Stars to the Little Ones Activities for Kids - Astronomy and Space Related What Kind of Telescope Should I Get? Hints, Tips, and Equipment for Stargazers June Nights have Stellar Delights Hints, Tips, and Equipment for Stargazers Losing the Dark Multimedia Resources - Astronomy Pictures, Space Videos - Audio Visual Education Slideshows 9 Common Dreams and What They Mean Psychology The Smallest Countries in the World Geography 10 Largest Sea Creatures Marine Life 9 Tips to Improve Your College Essay Style College Admissions What Was Underwear Like in Medieval Times? Medieval History Readers Recommend New Horizons has Flown by Pluto!!! Meet Charon: Pluto's Companion World 5 Solar System Secrets..
May 31, 2012, 9:11 PM Carl Sagan said that the Last Good Day on earth was about 5 billion years away, before expanding Sol slowly heats its inner rocky planets in a slow-absorb as it swells into a red giant. If we consider that our sun has left some 4,000 million years and that within 3,000 million earth will be engulfed by the resulting red giant, it is impossible to think that our solar system as we know it, keep the same configuration
Moon and Andromeda: Relative size in the sky.
(Edited to add: Because this shot is in the UV, which is invisible to our eyes, Andromeda wouldn't look exactly like this in the sky, but in fact the visible light images of it look pretty similar, so it's close enough for the point being made.) The Andromeda galaxy in the ultraviolet, as seen by NASA's GALEX mission
Andromeda Galaxy Photos: Amazing Pictures of M31
Mellinger This photo illustration depicts a view of the night sky just before the predicted merger between our Milky Way galaxy and the neighboring Andromeda galaxy. The image on the left shows a sum of Chandra images taken before January 2006 and the image on the right shows a sum of images taken after January 2006
How far away is the Moon? - Bad Astronomy : Bad Astronomy
The gravitational pull on an object on the surface (according to my recalled Newtonian basic physics here) should be directly proportional to the mass of the planet and inversely proportional to the square of the radius. February 24, 2011 at 8:28 am Pete Jackson Another mind-bending property of the scale setup (basketball and tennis ball) that Phil has put here is that if you fill the basketball with iron until it is as dense as the Earth (making it like a real heavy bowling ball), and there were just this dense basketball and tennis ball in empty space, then the tennis ball would take the same amount of time, 27 days, to orbit the dense basketball under its gravitational pull as the Moon takes to orbit the Earth! It gives a intuitive feeling for how weak gravity really is
Which Is Closest To The Earth: Alpha Centauri, Orion Nebula, The Milky Way, Andromeda, Pluto, Or The Sun? - Blurtit
(Note: A nebula is a cloud of dust and gas in space.)The Milky Way The Milky Way is our own galaxy, and is approximately 100,000 - 120,000 light years across - so most of the bodies within it are still much further away than anything else I've mentioned so far.Andromeda Andromeda is a spiral galaxy, located almost 2.5 million light years from Earth. To try and answer your question properly, though, here are the celestial bodies you mentioned in ascending order, by their distance from the Earth:The Sun Our local star
How Many Stars in the Galaxy?
Ronald March 12, 2009 at 12:10 I think I understood that the number of stars in a galaxy is not primarily, or at least not only, determined by its mass, but by its total luminosity. One way I like to think about the number 1 billion is to think of one liter packed tightly with the finest flower grains that exist within a bag of fine grained flower such as Gold Medal Brand fine grained flower
If the Earth Were a Grape
How far away would these objects be if the Earth, which is actually about 8,000 miles in diameter, were the size of a grape, or about one half inch in diameter. In order to grasp the diversity in true distances in the universe it helps to mentally scale things down - to compare with objects and distances we can understand
Hubble Finds Giant Halo Around the Andromeda Galaxy - SpaceRef
The properties of these gaseous halos control the rate at which stars form in galaxies according to models of galaxy formation," explained the lead investigator, Nicolas Lehner of the University of Notre Dame, Indiana. The team also determined that it is enriched in elements much heavier than hydrogen and helium, and the only way to get these heavy elements is from exploding stars called supernovae
(This angular measure stays the same regardless of whether an object is nearby or far away; distant objects must be much larger to subtend the same angle as near objects). Considering the absolute threshold, the brightness of a candle flame, and the way a glowing object dims according to the square of the distance away from it, vision scientists conclude that one could make out the faint glimmer of a candle flame up to 30 miles away
How to destroy the Earth @ Things Of Interest
In the last minutes, stars and planets will come apart, and atoms will be destroyed a fraction of a second before the end of time." Cool, eh? Earth's final resting place: HAH! If I knew that, I wouldn't need aftershave. The concept is simple: find a really, really big asteroid or planet, accelerate it up to some dazzling speed, and smash it into Earth, preferably head-on but whatever you can manage
You see, Andromeda is the largest of all spirals in the night sky from our vantage point; regardless of what it was, it was reasonable to assume the reason it was so big is because it was closer to us than all the others. You have an apparently star-less extended nebula, that only resolves into an enormous number of stars when viewed with a huge telescope, and a star coincident in the sky with that object that is an enormous distance away
Hubble Finds Giant Halo Around the Andromeda Galaxy
.......they measured the mass alright, but you forgot to read their conclusion about the "mass" of the halo: "The gargantuan halo is estimated to contain half the mass of the stars in the Andromeda galaxy itself, in the form of a hot, diffuse gas." Dark matter really is not that weird of an idea. Could the Milky Way become a quasar? February 27, 2015 A quasar is what you get when a supermassive black hole is actively feeding on material at the core of a galaxy
Even though our solar system is part of the Milky Way, the view looks distant because most of the light comes from the population of stars that are closer to the galactic center than our own Sun. Views of the Solar System Our Milkyway Galaxy This image of our galaxy, the Milky Way, was taken with NASA's Cosmic Background Explorer's (COBE) Diffuse Infrared Background Experiment (DIRBE)
You can see the Milky Way Galaxy from Earth with the naked eye - Milky Way Galaxy facts
How to see the Milky Way back Can you see the Milky Way Galaxy from Earth at night with the naked eye? Yes, in fact, the Milky Way Galaxy is one of the most interesting naked eye sights in the night sky. At longer wavelengths in the infrared, light passes through these clouds more easily and we get a better view of the overall shape of our Galaxy, but there are still enough clouds created a dark reddened lane through the middle of the Milky Way Galaxy
Identical in form and function with its sister craft, Voyager 1, it was launched on a slower, more curved trajectory that allowed it to be kept in the plane of the ecliptic. It is bright enough to be visible during daytime on Earth, while at night, it is similar to the full moon.* Of much greater concern, however, are the lethal jets of gamma radiation released by the dying star
How far ? How big ? How many ?
How far ? How big ? How many ? How far? How big ? How many ? Light - our measuring stick in space How far does light travel in one second ? 300 000 kilometers, which equals seven times around the Earth. Multiplying a light second by the number of seconds in a year, we can answer the question: How far is a light year? 10 trillion kilometers (or more exactly, 9.5 x 1012 km)
BBC Universe - The Andromeda galaxy is our galactic neighbour
Melvyn Bragg and guests discuss the galaxies; spread out across the void of space like spun sugar, but harbouring in their centres super-massive black holes. This clip looks at some of the American astronomer Edwin Hubble's most important contributions to astronomy and the equipment he used at the Mount Wilson Observatory
What is a light-year and how is it used?? StarChild Question of the Month for March 2000 Question: What is a light-year and how is it used? Answer: A light-year is a unit of distance. Return to the StarChild Main Page Go to Imagine the Universe! (A site for ages 14 and up.) The StarChild site is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr
The faint outer parts of a spiral galaxy are more susceptible to warping because they are less strongly bound by the gravitational and other forces that keep disk stars in a plane and are also more susceptible to the influence of neighboring galaxies. In this 2010 infrared image, dust heated by newborn, massive stars are depicted in yellow and red, which trace out the spiral arms, while mature stars are colored blue (more)
However, the unaided eye can still detect some amazing objects which not only allow us to see thousands of light years away but let us catch a glimpse to the beginnings of the Universe. Over the past 10 years Hubble has been looking deep into space into the constellation of Fornax in the Southern hemisphere and has discovered thousands of galaxies
For example, billions of small reflective bits of metal could be placed in an orbit between earth and sun, possibly at the L1 Lagrangian point (so they would stay in the same relative place from earth as we go around the sun). New data collected by the Hubble Space Telescope proves, NASA says, that in 4 billion years the Milky Way and Andromeda will collide or pass each other by so closely that the gravitational force each exerts on the other will cause them to slow down to the point of merging
How far is that? Multiply the number of seconds in one year by the number of kilometers (or miles) that light travels in one second, and there you have it: one light-year. Scaling the astronomical unit at one inch, here are distances to various stars, star clusters and galaxies: Alpha Centauri: 4 miles Sirius: 9 miles Vega: 25 miles Fomalhaut: 25 miles Arcturus: 37 miles Antares: 600 miles Pleiades open star cluster: 440 miles Hercules globular star cluster (M13): 24,000 miles Center of Milky Way galaxy: 27,000 miles Great Andromeda galaxy (M31): 2,300,000 miles Whirlpool galaxy (M51): 37,000,000 miles Sombrero galaxy (M104): 65,000,000 miles Astronomers measure the distance to the Andromeda galaxy using light-years
How to Find the Andromeda Galaxy: 7 Steps (with Pictures)
If you're already familiar with using a telescope, you will be aware that its narrower field of vision than binoculars can make the targeting more precise and consequently harder. You might wish to try to photograph it to make it show up, but you will likely need a long exposure time, a camera adapter, and image stacking software such as Registax or ImagesPlus
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