Spring Astronomy Week on May, 2019: Astronomy?
Spring Astronomy Week 2019. Holiday stars over Canada's best hot spring - Wilderness Astronomy last week where you should
1)Since antiquity, people have noticed that oceans exhibit a much greater tidal range around the time of the full and new Moon. This is when the Moon and Sun are either together in the sky or are on opposite sides of the heavens. Higher tides occur during these Moon phases because the Sun also exerts a gravitational pull on our oceans, although it is only 46 percent as strong as the Moon's. When the gravitational effects of the Sun and the Moon combine, we get spring tides, which have nothing to do with the season of spring. The term refers to the action of the seas springing out and then springing back. These are times of high high tides and low low tides. A week later, during either of the two quarter Moon phases, when the Sun and Moon are at right angles to each other and their tidal influences partially cancel each other out, neap tides occur, and the tidal range is minimal. In fact, because the oceans take a bit of time to catch up to the geometry of the Moon, spring and neap tides usually occur about a day after the respective lunar cycles.
3)Tide-generating forces (TGF) are a result of the gravitational attraction between the earth, the sun, and the moon and the centrifugal force due to the relative motions of the moon around the earth, and the earth around the sun. While these forces exactly balance on average, the local mismatch at the earth's surface creates a horizontal force directed towards the surface points closest and farthest from the moon (the "lunar" TGF) and the sun (the "solar" TGF).
The crust of the earth is slightly elastic, so that it is deformed by the TGFs, creating lunar and solar tidal budges (high land) at the points closest and furthest from the moon and sun respectively. To an observer fixed on the earth's surface, these tidal budges move from east to west around the earth as it rotates each day, thus causing two luner and two solar high earth tides about each day. The period of the solar tide is exactly 12.00 hours, while the period of the lunar tide is slightly longer, 12.42 hours, due to the moon's revolution around the earth every 27 days. These tides are called the "semidiurnal" tides since they have periods of roughly 1/2 day. The inclination of the earth's spin axis to the plane of the moon's revolution about the earth and the earth's revolution about the sun creates in addition weaker "diurnal" tides with periods of roughly 1 day. The amplitude of the semidiurnal lunar high earth tide is about 1 m at the equator, about twice that of the solar tide. We do not feel these earth tides due to their very large horizontal scales (many 1000's km).
The fluid ocean also experiences the TGFs. Unlike the simple tidal budges created in the earth's crust, ocean tides have complex spatial patterns due to the complicated shapes and topographies of the different ocean basins. In general, however, ocean tides at any spot consist of a mixture of semidiurnal and diurnal tides. The world's largest semidiurnal tides exist in the Bay of Fundy (maximum high tide ~12-15 m), where the Bay of Fundy/Gulf of Maine acts as a coupled hydrodynamic system which is forced near its own resonant frequency by the semidiurnal tide in the western North Atlantic Ocean. Similar very high tides are found in other coastal areas (e.g., the Amazon and the Patagonia shelves) where the regional topography creates a near-resonant response to the adjacent deep ocean tide.
4) u already asked that
7)An International gathering of world leaders in science met in Geneva to discuss their latest findings. Each nation took a turn sharing its latest developments. The leader of one nation stood before the group and declared that they had devised a spacecraft which would allow their astronauts to fly directly to the sun. He was met with boisterous laughter from the audience, to which he boldly replied, "I know what you're thinking, but we have a plan. We're going to fly the ship at night!"
Just about everybody knows that you can't fly directly to the sun, for several reasons, not the least of which is that you can't even land there because there is no there to land on. The sun is a star, which is an enormous ball of burning gases. If you remember from your science lessons in school about the three states of matter (solid, liquid, gas) you remember that gases are not
solids. In order to land and stand on any celestial body, it would need to be solid because we are solid. Oh yeah, for us to fly anywhere near the sun we would have to build a spacecraft that could withstand over 1,000,000 degrees Kelvin AND keep the people inside protected from not only the extreme heat, but the intense light and solar radiation. Human beings were built to withstand the intensity of the sun from the distance of earth, not any closer. Even at this distance, too much exposure to the sun can be dangerous. Besides, we don't really need to fly to the sun to study it, we can make observations from afar (it's much safer).
The Source of the Sun's Tremendous Energy
You would probably think of the sun as very old, as it is estimated that the "birth" of the sun happened 4.5 billion years ago. Things that grow old usually die, but 4.5 billion years is young for our sun. It is estimated that there is enough fuel in the interior of the sun to keep that lamp burning for about another five billion years, growing twice as bright as it is now. The source of the sun's fuel is hydrogen and helium gases. Through a special chemical reaction, called nuclear fusion, the hydrogen gas is "burned" releasing an enormous amount of energy in the form of light and heat.
Two isotopes of the element Hydrogen (tritium and deuterium) collide with each other under extreme heat in the interior of the sun. The two atoms smash into each other so hard that several things happen
8)i don't know
9)Starting with the planet closest to the sun and moving further away: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.
10)Mercury is the smallest planet in our Solar system as Pluto is no more considered as a planet and Jupiter is the largest in our Solar system.
11)The basic difference between a star and a planet is that a star emits light produced in its interior by nuclear 'burning', whereas a planet only shines by reflected light.
There seem to be an enormous number of stars that are visible to the naked-eye at a really dark site but, in fact, the eye can only see about two thousand stars in the sky at one time. We can see the unresolved light of many thousands more when we look at the Milky Way, and the light of the Andromeda galaxy, which can be seen by the eye, comes from thousands of millions of stars.
The Sun is our own special star yet, as stars go, it is a very average star. There are stars far brighter, fainter, hotter and cooler than the Sun. Basically, however, all the stars we can see in the sky are objects similar to the Sun.
The Sun (and any other star) is a great ball of gas held together by its own gravity. The force of gravity is continually trying to compress the Sun towards its centre. If there were not some other force counteracting gravity, the Sun would collapse. Outward pressure is produced by the radiation from nuclear energy generation in the Sun's interior.
12) do u mean with moons or man made satellites.
14)The Sun’s gravitational pull holds the solar system together. The planets, asteroids, comets, and dust that make up our solar system are strongly attracted to the Sun’s huge mass. This gravitational attraction keeps these bodies in orbit around the Sun. The Sun also influences the solar system with its diffuse outer atmosphere, which expands outward in all directions. This expanding atmosphere fills the solar system with a constant flow of tiny, fast, electrically charged particles. This flow is called the solar wind. The region through which the solar wind blows is called the heliosphere. The heliosphere extends outward from the Sun to about 150 times the distance between Earth and the Sun. Interstellar winds may give the heliosphere an egg shape. The solar wind spreads out as it leaves the Sun. The point at which the solar wind is so diffuse that it stops having an effect on its surroundings is called the heliopause. The heliopause marks the outer edge of the solar system.
15)Gravity is a force of attraction only between bodies that have mass. The word 'gravity' comes from the Latin word "gravitas", meaning 'weight'. The force of gravity that one body exerts on another can be expressed as:
16)The Sun's mass acts through gravity to keep each of the planets in an orbit around it. These orbits are elliptical and the time each planet takes to go around the Sun depends on the distance of the planet from the Sun according to the law discovered by Kepler in the 17th century.
The orbits of the planets about the Sun are all close to the same plane. This is thought to be due to the way in which they were all formed from a disk of residual matter around the Sun following the collapse of the original gas cloud.
17)i dont know
18) polar orbit is an orbit where the satellite travels in a North to South direction instead of the common West to East orbit.
Because the earth spins in an Easterly direction, a polar orbit will eventually cover every possible combination of latitude and longitude.
This makes polar orbits very useful for satellites which monitor the earth, such as weather satellites and g
Is it me or does it still feel like we are still waiting for the spring? apart from it being sunny last week.?
the 21st of March spring is based on astronomy, in meteorlogical terms I would say that it should now be spring.
Need help for astronomy (seasons)!?
Questioners have their problems.
One is plain ignorance. it is seen when a question is structured in a way that it doesn't make sense because it is lifted from some passage, out of context. Some questions are aimed at confusing you and I call such a one 'Googly' (borrowed from Cricket - it means that it appears to be an Off spin but turns out leg spin). In such situations, regain your composure, go back to the basics, write it down even it is not required and reason out.
Like most things on Earth concerning 'naming', it is Euro centric approach that prevailed in naming the Equinoxes as 'Autumn' or 'Spring' as these are the seasons in Northern hemisphere at those times. But while it is AE in North it is SE in South; no harm in saying that. If you want you can qualify by saying 'Southern Spring Equinox'.
The fact is the Axis (of Earth) which is bent at 23.45 degrees permanently; changes orientation with seasons. It can't be helped because the axis is pointing to a spot (Polaris or Pole Star) while executing the orbit. At Equinox times, this line is at right angles to the line joining (Earth to) Sun.So it is bent neither towards Sun (like in Summer for Northern hemisphere) nor away (like in Summer for Southern and winter for Northern hemisphere) from it.
'Alignment by both poles' means nothing; aligned with what other line?
Because the poles are at indifferent angles with Sun (at right angles to the line joining it), both poles are placed equally favourably from Sun and so receive sunlight for equal times. This is not the case if one pole is bent towards Sun (Solstices) and the other away, obviously.
Nothing like experimenting. This simple experiment costs next to nothing. In a dark room keep a candle on a table, and rotate a 'globe' around it with its axis bent at approximately 23.45 degrees pointing at one corner of room constantly. If you have an argument on this, you can prove by demonstrating it to them, unabashedly.