... Listed below are questions submitted by users of "From Stargazers to Starships" and the answers given to them. ... In "The Great Magnet, the Earth" on magnetism of the Earth. In "The Exploration of the Earth's Magnetosphere" on the magnetic environment of Earth in space. ... 11) Why don't we feel the Sun's gravity pull? ... 148) View of Earth and Moon from Mars . ... 29) Gravity at the Earth's Center . ... 84) How far does Earth's Gravity Extend? 96) Where do gravity of Earth and Sun balance? ...

Еще в разделе: (Показать все результаты (>1273) - www.cosmos.ru/ )

• FAQ: "Exploration of the Earth's Magnetosphere"
• The Rotating Earth
• The Sun

The Sun gives us light and heat, sustaining life on Earth. ... This uneven rotation, coupled with the churning of the upper layers, might well be what produces (by a "dynamo mechanism", described in a later section) regions of intense magnetic field, seen by observers on Earth as dark sunspots. ... Near sunspots those streamers seem to be shaped by the Sun's magnetic field lines, and above the Sun's poles they suggest field lines rising from twin magnetic poles like those of the Earth. ...

Еще в разделе: (Показать все результаты (>956) - www.iki.rssi.ru/ )

• Rotating Frames of Reference in Space and on Earth
• The Acceleration of the Aurora
• Energetic Particles

S P E C I A L R E P OR T F F 62 ROM SLOWDOWN to SPEEDUP By Adam G. Riess and Michael S. Turner Distant supernovae are revealing the crucial time when the expansion of the universe changed from deceler ating to acceler ating tion. ... Gravity keeps us grounded. ... Although Einstein's general theory of relativity allows for gravity to push as well as pull, most physicists regarded this as a purely theoretical possibility, irrelevant to the universe today. ...

Еще в разделе: (Показать все результаты (>12272) - www.stsci.edu/ )

• Black holes in galactic nuclei
• brown dwarfs - 1
• Dr. Adam Riess - Dark Energy

... Some wonder if smaller wheels have less inertia and therefore give greater acceleration, while others believe that the smaller wheel has to spin faster, so it is a wash. ... The kinetic energy in the wheel is a measure of how much energy you've spent just getting the wheel to spin rather than investing that energy into the road. ... Larger wheels have less rolling resistance, for several reasons. ... So how much difference does the lower inertia of smaller wheels really make? ...

Еще в разделе: (Показать все результаты (>3850) - hea-www.harvard.edu/ )

• Everyday Classroom Tools: Introduction to the Threads of Inquiry
• PAUL J. GREEN - Contributing ConcepTests
• Bishop School: Links around the Web

... This appartus will drop a mass from different heights. When the mass strikes the ground, some percentage of its original energy will be absorbed by the ground. ... The percentage of the energy which is absorbed by the surface on each "bounce" (EAS) . ... The impact velocity of the object will also be given at each bounce. ... Start= Drop the ball after Energy, Mass and EAS have been set; resume after step or pause has been selected . ... Reset = Reset experiment to intial values . ...

Еще в разделе: (Показать все результаты (>617) - zebu.uoregon.edu/ )

• Energy From the Wind
• Climatology; Ice Ages
• Astronomy HyperText Book: Stellar Evolution

Lecture 6 Checking, and Circular Motion Friday, 4 March 2011 Course Representatives · · We need to elect some. ... Friday, 4 March 2011 Trick 1: Is the answer ludicrous? ... Friday, 4 March 2011 Clicker Question · · · Friday, 4 March 2011 A cyclist of mass 80kg is cycling up a 10% slope hill at a constant speed of 7 m/s. Because the speed is constant, he is exerting no power and hence doing no work. ... Friday, 4 March 2011 Motion in a Circle, at constant speed. ... Result - motion in a circle. ...

Еще в разделе: (Показать все результаты (>619) - www.mso.anu.edu.au/ )

• PHYS1101 2011 WebCasts
• Pink Black Holes: Frequently Asked Questions
• Worked Example 02

... Gravity is responsible for keeping your feet on the ground and keeping the Earth and all other planets in our Solar System in their orbits around the Sun. ... Einstein's theory of gravity, known as the theory of General Relativity. This suggested that gravity is actually the curving of the fabric of the Universe, known as 'spacetime', around objects. For instance, a very heavy star warps the space around it, causing a deep well in the fabric, and pulling in anything that comes too close. ...

Еще в разделе: (Показать все результаты (>66248) - www.eso.org/ )

• Wide-field view of the sky around VFTS 102: the fastest rotating massive star
• Wide-field view of the sky around VFTS 102: the fastest rotating massive star |
• how crystals fall

... Two years ago, the Clementine space probe snatched this picture of the Moon as lit not by direct sunlight, but by reflected sunlight from Earth. ... Out With the Tide . ... Tides occur because the gravitational force between two bodies decreases with distance. ... The imbalanced gravitational pull of the Moon causes the oceans to be slightly non-spherical, creating two high tides and two low tides. ... In return, the Moon exerts a gravitational force on the high tide, causing Earth to rotate slower....

Еще в разделе: (Показать все результаты (>1227) - www.astrosociety.org/ )

• ASP: Up, Up, and Away
• ASP: Classroom Activity: Playground Physics
• ASP: Family ASTRO for Families and Friends: Getting Involved and Frequently

... This talk focuses on exploring the connection between Ly absorbers and galaxies. The theorist view of gas in the low z universe is based on the filamentary structures that are evident in simulations based on the CDM paradigm. ... The observer's view of gas in the low-z universe is based on the Ly absorbers which have column densities as low as 10 cm , while galaxies are at column densities of 10 cm . ... The absorber has N cm . ... Can examine LSS defined by gas-rich galaxies around absorbers. ...

Еще в разделе: (Показать все результаты (>3234) - www.naic.edu/ )

• on,off position switching offsets
• Galactic ALFA Surveys
• RFI Issues at AO

... Bad Astronomy . ... Every few months, one of a series of questions comes up on the USENET group sci.astro involving tides, or the rotation of the Moon, or the recession of the Moon from the Earth. ... Why the Moon's rotation period is the same as the length of time it takes to orbit the Earth (same as number 1, but phrased differently). ... But when this happens, the time it takes for the Earth to rotate once will be slowed to exactly the same time it takes for the Moon to go around the Earth once! ...

Еще в разделе: (Показать все результаты (>397) - www.badastronomy.com/ )

• Phil Plait's Bad Astronomy: Bad News
• Phil Plait's Bad Astronomy: Mad Science
• Phil Plait's Bad Astronomy: SPOILER Review: Austin Powers: The Spy Who Shagged

What happens to a star heavier than five solar masses? ... Stars about ten solar masses probably behave like our five solar mass star until they reach the end of core-helium burning. ... The Crab nebula was formed after a massive explosion ripped a star apart in 1054. ... Today, the glowing outer layers of the star are still rushing away from a tiny star in the centre. ... An incredible explosion rips through the outer layers of the star, releasing colossal amounts of energy in a supernova explosion. ...

Еще в разделе: (Показать все результаты (>2820) - star.arm.ac.uk/ )

• Strong Gravity in the Vicinity of Supermassive Black Holes - by Eamon Scullion,
• Astrodynamics 101
• Armagh Observatory

otherwise stated, constants are denoted by the following symbols and may be taken to have the values below Elementary charge Speed of light in vacuum Planck constant Permeability of vacuum Permittivity of vacuum Unified atomic mass constant Rest mass of proton Rest mass of electron Boltzmann constant Avogadro constant Gravitational ... A pulse of light of frequency f is emitted from the space station towards the ship at exactly the time the ship passes the Earth in the Earth frame. ...

Еще в разделе: (Показать все результаты (>3188) - www.mrao.cam.ac.uk/ )

• http://www.mrao.cam.ac.uk/~kjbg1/exams/2008_paper.pdf
• Astrophysics Group VSA
• Astrophysics Group Research and Instrumentation

... --------------- SLY = (Vampire looking guy, high collar, grey backdrop) ------------------------------------------------------- Avg Elims /year : 5.29 Favorite veapons: S B Delta Max-1 Home : Moon Base Alpha Best Track : Chicago Car : Night Stalker Favorite Food : Smokey Links MOTOR MANIAC = (Negro guy with brace over nose, blue backdrop) -------------------------------------------------------------- Avg Elims /year : 6.42 ...

Еще в разделе: (Показать все результаты (>4731) - crydee.sai.msu.ru/ )

• http://crydee.sai.msu.ru/ftproot/pub/rec/music/lyrics/cs-uwp/d/drugstore/drugstore
• http://crydee.sai.msu.ru/ftproot/pub/rec/music/lyrics/cs-uwp/m/moody.blues/question
• http://crydee.sai.msu.ru/ftproot/pub/rec/music/lyrics/cs-uwp/folk/a/all_around_my_hat

... How much brighter is the Sun as viewed from the planet Mercury as compared to Earth ? ... Actually, all of these questions can be answered through a very simple mathematical relationship known as the inverse square law. ... As the distance from the Sun increases the surface area of the sphere grows by the square of the distance. ... Common sense tells us that the Sun will be brighter and the inverse square law tells us how much brighter. ... gr = 0.912 G or 91.2% gravity felt at Earth's surface. ...

Еще в разделе: (Показать все результаты (>9941) - www.arcetri.astro.it/ )

• Arcetri Solar Physics Group - Corona and Solar Wind
• Virgo Group - Gravitational Wave basics
• What's New

... 4.09.2001 . ... Fast expanding gas clouds mark the end for a central star in the Rotten Egg Nebula. The once-normal star has run out of nuclear fuel, causing the central regions to contract into a white dwarf. Some of the liberated energy causes the outer envelope of the star to expand. Deimos: A Small Martian Moon . ... Mars has two tiny moons, Phobos and Deimos. ... AFGL 2591: A Massive Star Acts Up . ... Young star AFGL 2591 is putting on a show. ... Uranus: The Tilted Planet . ...

Еще в разделе: (Показать все результаты (>110124) - www.astronet.ru/ )

... Great oppositions. ... Proxima Centauri. ... Scientists proved that the problem of preserving the Earth's climate and the annual change of seasons can be solved by a small star, negligible mass, but similar to a main-sequence star, moving in a circular orbit around the Sun. ... Sombrero Galaxy. The Sombrero Galaxy, M104, is known as a holder of one of supermassive black holes. ... Roughly estimate the approximate mass of the supermassive black hole in the center of M104 (answer in solar masses m). ...

Еще в разделе: (Показать все результаты (>951) - www.issp.ac.ru/ )

Blackholes Forum Message . ... Good Question. ... We really don’t know what causes gravity ( mass properties ) only how it works in the present universe state. ... It may be that you have just proven your assumption is wrong and gravity/mass properties do depend on the present universe state to exist. ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

Еще в разделе: (Показать все результаты (>632) - www.astronomy.net/ )

• A Question Of Atmosphere On Our Moon!? - an Astronomy Net God Science Forum
• Question Answered - an Astronomy Net UFO Forum Message
• Speed Of Gravity - an Astronomy Net Gravity Forum Message

... Please find below the final programme of the workshop. Each regular talk will be 20 minutes long plus another 10 minutes for questions and discussion at the end. On Friday there will be a pizza lunch combined with an informal discussion session kindly facilitated by John Dickey and Felix J. Lockman. ... Coffee . ... Magnetic Fields in the Thick Disk of the Milky Way . ... Highly Ionized Plasma in High-Velocity Clouds . ... Limits on the Hot Diffuse Galactic Halo . ... John Dickey . ...

Еще в разделе: (Показать все результаты (>9315) - www.atnf.csiro.au/ )

• Research Interests
• Research - Compact high-velocity clouds around the Milky Way
• ATNF Media Release - November 5, 1998

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2011 July 14 . Neptune: Once Around . Credit: NASA , ESA , Hubble Heritage Team ( STScI / AURA ) . Explanation: Neptune rotates once on its axis in about 16 hours. ... Because Neptune's axis of rotation is tilted to its orbital plane by 29 degrees, compared to Earth's 23.5 degrees, Neptune experiences seasons analogous to Earth's . ...

Еще в разделе: (Показать все результаты (>4807) - www.sai.msu.su/ )

• APOD: 2015 August 11 - A Blue Moon Halo over Antarctica
• APOD: June 23, 1995 - Gamma Ray Sky Map
• APOD: January 4, 1999 - Ring Around the Cluster

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... June . ... Posted on April 7, 2016 | 2 Comments Armstrong and Aldrin were the first two people on the Moon when Apollo 11 landed there in July 1969. ... Continue Reading.. ... Posted on June 5, 2015 | ... Posted on September 26, 2014 | ... Posted on August 4, 2014 | 133 Comments June 2014 saw excited reports that NASA was working on a faster than light warp drive starship. ... Posted on June 13, 2014 | ...

Еще в разделе: (Показать все результаты (>2810) - www.armaghplanet.com/ )

• Space Flight | Astronotes
• Cosmology | Astronotes
• Cosmic Rays from Outer Space | Astronotes