equinox
spring going into summer, it is a warm month
Unless this is a trick question im going to say the moon.
A flashing light in the sky could be from various sources such as aircraft, satellites, or celestial bodies like stars. If it is a consistent pattern of flashing, it is likely an aircraft or satellite navigating through the airspace. If it is irregular or random, it could be a celestial object like a star or planet reflecting light.
Modern Astronomy is the astronomy in which we actually started looking at celestial bodies up close. Today there is a lot going on about the information of astronomy. Galileo was the first modern astronomer, just an interesting fact to throw in!
The science of going into space is known as astronautics or space travel. It involves the study of spacecraft design, propulsion systems, orbital mechanics, and how to sustain life in the harsh environment of space. This field also includes the exploration of celestial bodies such as planets, moons, and asteroids.
The Equator is an imaginary line (great circle) on the Earth's surface, which is equidistant from both the geographic poles and lies in a plane perpendicular to the Earth's axis of rotation. It divides the Earth into the Northern and Southern Hemispheres.An Equinox is either of the two times during a year when the sun crosses the celestial equator. At this time, the length of day and night are approximately equal as the Sun is exactly above the Equator.The vernal equinox occurs around March 21, when the Sun moves north across the celestial equator. The autumnal equinox falls around September 23, as the Sun crosses the celestial equator going south.
Northern Hemisphere:Saturday, March 20, 2010, was the official first day of spring for 2010 in the Northern Hemisphere. The Vernal Equinox occurred at 17:32 UTC. On that day, the Southern Hemisphere observed the Autumnal Equinox, which is the equivalent of the start of Autumn.Southern HemisphereThe official date of spring south of the equator (corresponding to the first official day of fall in places north of the equator) was September 23, 2010. (03:09 UTC)Countries such as Australia and New Zealand, however, designate the first day of September as the official first day of spring.September 1 in AustraliaSpring will start at March 20 in the year of 2010
Astronomically speaking, spring 2008 begins with the vernal equinox on March 20th in the Northern Hemisphere and with the autumnal equinox on September 22nd in the Southern Hemisphere. Some dictionaries define spring according to full months, in which case spring begins March 1st in the Northern Hemisphere, and September 1st in the Southern Hemisphere.
I doubt it.
The main system is called geocentric coordinates and they are spherical coordinates just like latitude and longitude on the Earth's surface. The one that corresponds to latitude is declination, and it runs from 90 south through zero at the equator to 90 north. A star with a declination of, let's say 40 degrees north, will always pass vertically overhead at a town whose latitude is 40 degrees north. Instead of north or south, declinations are sometimes quoted as positive or negative. The other is normally called right ascension and it runs from 0 to 24 hours. That is because astronomers measure the time at which a star crosses the meridian, relative to the First Point of Aries crossing the meridian. The First Point of Aries is a major reference position and is a point on the equator where the ecliptic crosses it going north. Therefore it is the point where the Sun is, at the Spring Equinox when it crosses the Equator from a south declination to a north declination.
the equator is an imaginary line going across the middle of the earth
First Day of Spring is on March 20, 2011Astronomical spring in the Northern Hemisphere as defined by the International Astronomical Union begins with the Vernal Equinox on March 20, 2011, at 7:21 p.m. EDT. At the start of spring (spring equinox), day and night are approximately 12 hours long (at the equatorial plane) and the Sun is at the midpoint of the sky. Our north pole tilts towards the Sun.NOTE-"the north pole tilts toward the sun." that is true on summer solstice, but in December the south pole tilts toward the sun. At the equinoxes the tilt is parallel to the sun.First day of spring in the Northern HemisphereIn general, the four seasons correspond to the relative position of the sun to the earth. Astronomical determination of spring is calculated according to when the sun passes through the equatorial plane. When going from winter to spring, the sun is moving north; as soon as the sun crosses the equator, we call it spring. (This applies to places north of the equator.)First day of spring in the Southern HemisphereThe "official" date of spring south of the equator (official is corresponding to the first day of fall in places north of the equator) would be around September 20/21, depending on when the sun crosses the equator.Countries such as Australia and New Zealand, however, designate the first day of September as the official first day of spring (climatological counterpart). Preference between these two methods varies across Europe. Many east Asian countries use lunar dates to determine the beginning of spring.In AdditionThe climatological spring as defined by the World Meteorological Organization began on March 1, 2011.The ecological spring begins locally with the beginning of the growing season. Usually in temperate climates when the mean daily temperature reaches 6 degrees C/42 degrees F. This can be as early as February in mild climates. and as late as April or May in cool climates.
The Tropic of Capricorn is south of the Equator. The Tropic of Cancer is north of the Equator.
They're both imaginary, and they're parallel.How to explain their relationship . . .Imagine the earth's equator ... the circular line drawn around the earth's fat middle, exactly half-waybetween the North and South Poles. Now imagine that the equator starts to get bigger. It's still lined upwith the same line on the earth, but its diameter is growing, and it loses contact with the surface, and keepsgrowing, until it's over everybody's head. Now ships are sailing under it on their way north or south, andit still keeps growing, like an enormous hula hoop (does anybody still know what those are?).After a few hours, the equator gets so big that we can't really tell any more that it's only a few hundred milesout there. Now it looks like it's a line on the solid surface of the sky ... the same surface that the sun, moon,and stars are all painted on. Everything drawn on that surface looks like it's the same distance above theearth ... the surface looks like the inside of a big globe. And it has that new line all the way around it, exactlyabove the earth's equator at every point, but up in the sky. That's the celestial equator.Another way to visualize the celestial equator ... maybe not a lot better than the first way, but here it is anyway:Picture a gigantic knife, big enough to come along and cut the whole earth in half.If it's big enough and comes in exactly right, it can cut the earth exactly on the equator, so you separate the bottomhalf from the top half. Those are the north and south "hemispheres". Now, each half of the earth can sit flat on a table,and the outside of the circle that it makes on the table is the line that used to be the equator.OK ? Good.Now if you will, picture an even BIGGER knife, one that makes the first one look like a boy scout's pocket knife.This one is truly ginormous, almost too big to imagine. It can slice stars, solar systems, galaxies ! We're going toslice the earth in half again with this one, and it has to be a clean cut. So we back way off almost to infinity, andcarefully line up our shot, so that we won't have to make any adjustments on the way in. When we're perfectlylined up, we make our move. We keep our knife flat, come in smooth and steady from infinity, hit the equatorexactly, and slice precisely between the hemispheres. Then we follow through, and keep going off to infinityon the other side, holding the knife flat all the way.We have not only cut the earth in half exactly along the equator. This time we have also cut the wholecelestial sphere in half, on a line exactly parallel to the earth's equator. That line is (was) the celestial equator.
The only ways you can travel along the equator is by going due west or due east and you can do it indefinately. Any other direction you would not be travelling along the equator
Latitude
Depends on whether you're in the Northern Hemisphere or Southern Hemisphere. In the northern hemisphere, the last day of Spring is 31 May (no matter what year it is). In the southern hemisphere, it's 31 November (no matter what year it is).