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... selection doesn't affect the calculation\x97the gravity of the moon is alwa ...
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... ty on the Moon compares to Earth.</p>]]></content:encoded>
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<?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" > <channel> <title>RSS Univers</title> <link>https://www.universator.com/</link> <description>Univers</description> <lastBuildDate>Sun, 21 Apr 2024 11:10:01 +0200</lastBuildDate> <language>en</language> <sy:updatePeriod>daily</sy:updatePeriod> <sy:updateFrequency>1</sy:updateFrequency> <item> <title>Force of gravity on Moon</title> <description>Your weight on the moon is a function of the moon's gravity. First, we know that gravity is a force that attracts all physical objects towards each other (but why this happens is largely unknown!). Second, the greater the mass of ...</description> <content:encoded><![CDATA[<img src="/img/nasas_gravity_atlas_of_the_moon.jpg" alt="NASA's Gravity Atlas of the" align="left" /><p>Your weight on the moon is a function of the moon's gravity. First, we know that gravity is a force that attracts all physical objects towards each other (but why this happens is largely unknown!). Second, the greater the mass of an object, the stronger the force of gravity. The moon is 1/4 the size of Earth, so the moon's gravity is much less than the earth's gravity, 83.3% (or 5/6) less to be exact. Finally, "weight" is a measure of the gravitational pull between two objects. So of course you would weigh much less on the moon. Imagine how far you could jump on the moon! The Apollo astronauts apparently had fun :-) Your Weight On The Moon If you were to take a scale to the Moon and stand on it, here's what it would say: * The "Units" selection doesn't affect the calculation\x97the gravity of the moon is always 1/6 of whatever unit you're using. Also: strictly or scientifically speaking, pounds and kilograms are measurements of mass, which remains constant (unaffected by gravity). Gravitational force or weight should technically be measured either in Newtons, kilogram-force (kgf) under the metric system, or pound-force (lbf) under the English system. In common, non-scientific usage, however, "pounds" and "kilograms" are understood to refer to weight and hence suits the purposes of this calculator, which is simply to see how the force of gravity on the Moon compares to Earth.</p>]]></content:encoded> <category><![CDATA[Gravitational Force]]></category> <link>https://www.universator.com/GravitationalForce/force-of-gravity-on-moon</link> <guid isPermaLink="true">https://www.universator.com/GravitationalForce/force-of-gravity-on-moon</guid> <pubDate>Sun, 21 Apr 2024 07:10:00 +0000</pubDate> </item> <item> <title>Big Bang new theory</title> <description>This is an artist's concept of the metric expansion of space, where space (including hypothetical non-observable portions of the universe) is represented at each time by the circular sections. Note on the left the dramatic ...</description> <content:encoded><![CDATA[<img src="/img/everything_we_know_about_the_big.jpg" alt="This" align="left" /><p>This is an artist's concept of the metric expansion of space, where space (including hypothetical non-observable portions of the universe) is represented at each time by the circular sections. Note on the left the dramatic expansion (not to scale) occurring in the inflationary epoch, and at the center the expansion acceleration. The scheme is decorated with WMAP images on the left and with the representation of stars at the appropriate level of development. Credit: NASA (Phys.org) —The universe may have existed forever, according to a new model that applies quantum correction terms to complement Einstein's theory of general relativity...</p>]]></content:encoded> <category><![CDATA[Newton Universal Law]]></category> <link>https://www.universator.com/NewtonUniversalLaw/big-bang-new-theory</link> <guid isPermaLink="true">https://www.universator.com/NewtonUniversalLaw/big-bang-new-theory</guid> <pubDate>Fri, 12 Apr 2024 07:05:00 +0000</pubDate> </item> <item> <title>Isaac Newton theory</title> <description>The following article is part of an in-depth biography of Sir, the English mathematician and scientist, author of the . It portrays the years after Newton's birth in 1642, his education, as well as his early scientific ...</description> <content:encoded><![CDATA[<img src="/img/isaac_newton_facts_summary.jpg" alt="Isaac Newton" align="left" /><p>The following article is part of an in-depth biography of Sir, the English mathematician and scientist, author of the . It portrays the years after Newton's birth in 1642, his education, as well as his early scientific contributions, before the in Woolsthorpe-by-Colsterworth, a hamlet in the county of Lincolnshire. At the time of Newton's birth, England had not adopted the Gregorian calendar and therefore his date of birth was recorded as Christmas Day, according to the Julian calendar. Newton was born three months after the death of his father, a prosperous farmer also named Isaac Newton...</p>]]></content:encoded> <category><![CDATA[Newton Universal Law]]></category> <link>https://www.universator.com/NewtonUniversalLaw/isaac-newton-theory</link> <guid isPermaLink="true">https://www.universator.com/NewtonUniversalLaw/isaac-newton-theory</guid> <pubDate>Wed, 03 Apr 2024 06:55:00 +0000</pubDate> </item> <item> <title>Who discovered Dark energy?</title> <description>Billions of years ago, the universe was crowded with tight-knit clusters of galaxies. Then, a party crasher got the upper hand. This mysterious force now called dark energy has since been expanding the universe at an increasing ...</description> <content:encoded><![CDATA[<img src="/img/a_day_in_the_life_anya.jpg" alt="A Day in the Life: Anya" align="left" /><p>Billions of years ago, the universe was crowded with tight-knit clusters of galaxies. Then, a party crasher got the upper hand. This mysterious force now called dark energy has since been expanding the universe at an increasing pace. New measurements of this accelerating expansion, which drives galaxies away from one another on large scales but so far shows no effects on small scales (such as within a galaxy), provide details about the nature of the unseen and unknown dark energy that is at work. The results, announced today at a news conference organized by NASA, reveal a decrease in the mass of galaxy clusters in more recent times, which would be a consequence of this hastening and ripping force that some think could eventually tear apart even star systems, planets and eventually the very molecules we're made of. "If there were any doubts 10 years after the initial discovery that the universe was speeding up, this should really dispel them, " said Michael Turner of the University of Chicago's Department of Astronomy and Astrophysics, who was not involved in the current study. In addition, the new results, which relied on the Chandra X-ray Observatory, suggest dark energy takes the form of what Einstein called the cosmological constant ? a term in Einstein's general relativity that represents the possibility of empty space having a density and pressure associated with it. If dark energy is indeed some kind of repulsive force that is linked with "nothing, " and the density of dark energy stays the same over time, astrophysicists say the expansion of the universe will continue to speed up. So rather than galaxies mingling and merging, they will fly away from one another. And billions of years from now, the scientists say, local superclusters of galaxies will also disintegrate and all other galaxies will ultimately disappear from the Milky Way's view. "We don't really have a clue why the universe is speeding up. We have some ideas, but we really don't understand it, " said Turner, who is credited with coming up with the term "dark energy." "And so having yet another method to study how that speed-up happened can only help us, can only make us more optimistic about eventually understanding what the dark energy is." Invisible force Dark energy was discovered in 1998 by two teams of astronomers, who measured light coming from exploding stars called Type IA supernovae, known as "standard candles" for their consistent brightness. The striking result was that distant supernovae were dimmer (farther away) than they would be in a universe that was slowing down. The result suggested the expansion of the universe was accelerating. And the teams proposed something called dark energy could be driving this acceleration. This acceleration, it is thought, began about 5 billion years ago. That was the first stand-alone evidence to support the idea of dark energy. And whereas then the repulsive force could have been brushed off as the result of possible errors in the measurements, more and more independent detections have solidified dark energy's existence. Astronomers estimate now that out of the total mass-energy budget in the universe, about 74 to 76 percent is dark energy, 20 to 22 percent is dark matter and 4 percent or so is normal matter that makes stars, planets and everything we see. And they know that some "force" is causing galaxies to fly away from one another, operating like antigravity. Rather than using Type IA supernovae, the new study is based on observations of clusters of galaxies at different time points in the history of the universe. Scientists say the new study marks the second stand-alone evidence for the existence of dark energy.? "This is surely the best job that anyone has been able to do so far in using clusters to measure how the universe has gotten clumpy over time, " said Robert Kirshner of the Harvard-Smithsonian Center for Astrophysics in Massachusetts. Kirshner, who was not involved in the current study, was on one of the teams that first discovered dark energy. Galactic growth A team led by Alexey Vikhlinin of the Smithsonian Astrophysical Observatory in Cambridge, Mass., used the Chandra X-ray Observatory to measure the hot gas in dozens of galaxy clusters, which are the largest collapsed objects in the universe. Some of these clusters are relatively nearby and others are more than halfway across the universe. Basically, the team was looking at X-rays emitted from this hot gas as it fell into areas chock-full of dark matter, or the mysterious material thought to act as scaffolding onto which galaxies mature. The X-rays can be converted into mass for a given cluster at a given point in time (depending on the age of the cluster). "It's like there's a tug-of-war going on between the dark matter trying to slow things down and clump things and the dark energy trying to speed things up and eventually making it hard for the galaxies or the dark matter to cluster, " Kirshner told SPACE.com . When astronomers look farther across the cosmos, they are looking back in time. And in fact, the results show an increase in the mass of the galaxy clusters further back in time, which supports the idea that dark energy started to win out in the tug of war at some point in the universe's history. Astronomers are not certain on the timing of the change from an expanding universe to one whose expansion is speeding up. With dark energy taking over, it would be more difficult for objects such as galaxies to get together and form clusters as space is being stretched. So astronomers would expect to see a slowdown of the growth of galaxy clusters in a dark-energy-dominated universe.</p>]]></content:encoded> <category><![CDATA[Dark Energy]]></category> <link>https://www.universator.com/DarkEnergy/who-discovered-dark-energy</link> <guid isPermaLink="true">https://www.universator.com/DarkEnergy/who-discovered-dark-energy</guid> <pubDate>Tue, 02 Apr 2024 08:44:00 +0000</pubDate> </item> <item> <title>Natural laws of Science</title> <description>Natural law noun 1. an ethical belief or system of beliefs supposed to be inherent in human nature and discoverable by reason rather than revelation 2. a nonlogically necessary truth; law of nature See also nomological (sense 2) ...</description> <content:encoded><![CDATA[<img src="/img/presentation_the_eighteenth_century_an_age.jpg" alt="Natural laws of science" align="left" /><p>Natural law noun 1. an ethical belief or system of beliefs supposed to be inherent in human nature and discoverable by reason rather than revelation 2. a nonlogically necessary truth; law of nature See also nomological (sense 2) 3. the philosophical doctrine that the authority of the legal system or of certain laws derives from their justifiability by reason, and indeed that a legal system which cannot be so justified has no authority Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co...</p>]]></content:encoded> <category><![CDATA[Newton Universal Law]]></category> <link>https://www.universator.com/NewtonUniversalLaw/natural-laws-of-science</link> <guid isPermaLink="true">https://www.universator.com/NewtonUniversalLaw/natural-laws-of-science</guid> <pubDate>Sun, 24 Mar 2024 09:18:00 +0000</pubDate> </item> <item> <title>Units of gravitational constant</title> <description>We use the gravitational constant in this form because in Newtonian physics, it makes the most sense: it is the conversion factor between force (mass times acceleration) and the product of the "inverse square law" (m_1m_2/r^2) ...</description> <content:encoded><![CDATA[<img src="/img/p_dogs_blog_boring_but_important.jpg" alt="The gravitational constant" align="left" /><p>We use the gravitational constant in this form because in Newtonian physics, it makes the most sense: it is the conversion factor between force (mass times acceleration) and the product of the "inverse square law" (m_1m_2/r^2) which has units of mass squared divided by length squared. However, in relativistic physics, arguably a more natural choice would be to use G/c^2, which has units of length divided by mass. In other words, it is just a conversion factor between our preferred units of length and mass, just as is a conversion factor between our preferred units of length and time...</p>]]></content:encoded> <category><![CDATA[Universal Gravitation Constant]]></category> <link>https://www.universator.com/UniversalGravitationConstant/units-of-gravitational-constant</link> <guid isPermaLink="true">https://www.universator.com/UniversalGravitationConstant/units-of-gravitational-constant</guid> <pubDate>Sat, 23 Mar 2024 06:38:00 +0000</pubDate> </item> <item> <title>Dark matter percentage</title> <description>Scientists have struggled for decades to identify the constituent particles of dark matter, but they’ve had little to show for all their efforts. A new study at Case Western Reserve University is now advancing the radical new ...</description> <content:encoded><![CDATA[<img src="/img/dark_matter_dark_matter_and_energy.jpg" alt="Click for view big size" align="left" /><p>Scientists have struggled for decades to identify the constituent particles of dark matter, but they’ve had little to show for all their efforts. A new study at Case Western Reserve University is now advancing the radical new hypothesis that dark matter may in fact be made not of exotic subatomic particles, but rather of macroscopic objects which would mass anywhere from a tennis ball to a dwarf planet, be as dense as a neutron star, and still be adequately described by the Standard Model of particle physics...</p>]]></content:encoded> <category><![CDATA[Dark Matter]]></category> <link>https://www.universator.com/DarkMatter/dark-matter-percentage</link> <guid isPermaLink="true">https://www.universator.com/DarkMatter/dark-matter-percentage</guid> <pubDate>Sat, 23 Mar 2024 06:38:00 +0000</pubDate> </item> <item> <title>Anti-Dark matter</title> <description>From: "Damian" The short answer is that we're not sure - scientists have not yet discovered what dark matter really is, and so we can't yet be sure if it has an antimatter counterpart. People have done a lot of thinking about ...</description> <content:encoded><![CDATA[<img src="/img/planck_dmlimits.jpg" alt="Planck" align="left" /><p>From: "Damian" The short answer is that we're not sure - scientists have not yet discovered what dark matter really is, and so we can't yet be sure if it has an antimatter counterpart. People have done a lot of thinking about this, however. In the most popular theories, the dark matter is composed of some new kind of elementary particle, usually just called a Weakly Interacting Massive Particle ("WIMP"). This particle would have been created in large numbers in the Big Bang, along with everything else we see in the universe around us...</p>]]></content:encoded> <category><![CDATA[Dark Matter]]></category> <link>https://www.universator.com/DarkMatter/anti-dark-matter</link> <guid isPermaLink="true">https://www.universator.com/DarkMatter/anti-dark-matter</guid> <pubDate>Fri, 15 Mar 2024 05:29:00 +0000</pubDate> </item> <item> <title>Moons gravitational pull</title> <description>Myth 1. The moon has a permanent dark side. Most grammar school students know that the moon presents only one face or side to the Earth. This is (roughly) true and gives rise to the idea that there is a permanently dark side of ...</description> <content:encoded><![CDATA[<img src="/img/presentation_u3_motion_forces_in_the.jpg" alt="Moons gravitational pull" align="left" /><p>Myth 1. The moon has a permanent dark side. Most grammar school students know that the moon presents only one face or side to the Earth. This is (roughly) true and gives rise to the idea that there is a permanently dark side of the moon, a thought immortalized in Pink Flyod’s music and elsewhere. In fact, the side of the moon that is perpetually turned away from Earth is no more dark than the side we see. It is fully illuminated by the sun just as often (lunar daytime), and is in shade just as often (lunar night), as is the familiar Man in the Moon face we see...</p>]]></content:encoded> <category><![CDATA[Gravitational Pull]]></category> <link>https://www.universator.com/GravitationalPull/moons-gravitational-pull</link> <guid isPermaLink="true">https://www.universator.com/GravitationalPull/moons-gravitational-pull</guid> <pubDate>Fri, 15 Mar 2024 05:29:00 +0000</pubDate> </item> <item> <title>Mass of dark matter</title> <description>This is a view of the universe from NASA's Fermi Gamma-ray Space Telescope. Physicists at Brown University studied seven dwarf galaxies (circled in white). Their observations indicate those galaxies are full of dark matter ...</description> <content:encoded><![CDATA[<img src="/img/of_the_mass_of_dark_matter.jpg" alt="Of the mass of dark matter" align="left" /><p>This is a view of the universe from NASA's Fermi Gamma-ray Space Telescope. Physicists at Brown University studied seven dwarf galaxies (circled in white). Their observations indicate those galaxies are full of dark matter because their stars’ motion cannot be explained by their mass alone, making them ideal places to search for dark matter annihilation signals. Credit: NASA/DOE/Fermi-LAT Collaboration/Koushiappas and Geringer-Sameth/Brown University Physicists have set the most precise limit yet on the mass of dark matter, the mysterious and elusive stuff that is thought to make up 98 percent of all matter in the universe and nearly a quarter of its total mass...</p>]]></content:encoded> <category><![CDATA[Dark Matter]]></category> <link>https://www.universator.com/DarkMatter/mass-of-dark-matter</link> <guid isPermaLink="true">https://www.universator.com/DarkMatter/mass-of-dark-matter</guid> <pubDate>Mon, 11 Mar 2024 05:55:00 +0000</pubDate> </item> </channel></rss>If you would like to create a banner that links to this page (i.e. this validation result), do the following:
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