Why is the sun larger on sunrise and sunset?
90131
In reality, the Sun is always the same size! The illusion of difference in what appears to be a difference in size can be explained by, where on the planet you are viewing it from(are you viewing the rising and the setting sun in the East? The west is farther away when you watch it set), the Seasons(distance from the Earth), the angle at which you are viewing it from, atmospheric inconsistancies and plain old Optical illusions. Take your pick or combination of the above.
1015345
The Earth rotates on its access and revolves around the Sun.
17267
It is an optical illusion.  The sun is the same size all the time.  When it is at the horizon, you have many things to compare it to.  When it is in the middle of the sky, there is just sky....
989266
for the same reason ours get bigger or smaller: to let in more or less light depending on the environment
530453
Aside from the obvious size difference (109 times in diameter) the sun is made up of Hydrogen and helium, while the Earth has much heavier elements, the surface of the sun is as hot as the core of the earth, and is very, very bright.\n\nEarth                   \n\nVolume___________1.08 X 10^12 Km^3       \nSurface Area_____5.1 X 10^8   Km^2       \nMass_____________5.97 X10^24  Kg         \nGravity__________9.8 m/s^2\nSurface Temp.____-88-58 degrees C       \nCore Temp._______6226.85 degrees C\nChemical makeup__98% nitrogen and Oxygen (atmos.)         \n\nSun\n\nVolume___________1.41 X 10^18 Km^3\nSurface Area_____6.09 X 10^12 Km^2\nMass_____________1.98 X 10^30 Kg\nGravity__________273.95 m/s^2\nSurface Temp.____5506 degrees C\nCore Temp._______4.99 X 10^6 C\nChemical Makeup__98% Hydrogen and Helium\n\nThe sun is 332,590 times more massive than Earth.
261136
The sun is associated with greater curvature, because it is a high concentration of mass that actually pulls and twists space time around itself. The universe, by contrast, is very flat because it is mostly empty and only has local regions of curvature.\n\nThis can be proven by noting that light bends quite a bit around the sun, but light from the other end of the universe(the CMB) has been altered very little. If it had high positive curvature like that of the sun, light from the other side of the universe would be magnified, which it is not. \n\nSince you posted twice, I'm answering twice.
805182
It's always daytime in space. Unless you are stuck behind a planet or a moon or something else, then it's dark as hell... The spining of the Earth creates day and night.
562590
WHY IS THE SUNSET RED?   \n\nAs the sun begins to set, the light must travel farther through the atmosphere before it gets to you. More of the light is reflected  and scattered. As less reaches you directly, the sun appears less bright. The color of the sun itself appears to change, first to  orange and then to red. This is because even more of the short wavelength blues and greens are now scattered. Only the longer  wavelengths are left in the direct beam that reaches your eyes.   \n\nThe sky around the setting sun may take on many colors. The most spectacular shows occur when the air contains many small particles of dust or water. These particles reflect light in all directions. Then, as some of the light heads towards you, different amounts of the shorter wavelength colors are scattered out. You see the longer wavelengths, and the sky appears red, pink or orange.
205942
Bigger that what? \n\nRemember, these planets are still a long ways away. \n\nAnd the morning star/evening star, which is Venus, sometimes called Lucifer or Hesperides or Phosphorus or Hesperus (The identification of morning star with evening star, or Phosphorus=Hesperus was famously realized by Pythagoras) is very large and bright in the sky sometimes. \n\nMercury is a bit harder to see because it is so small, and so close to the sun.
732650
People usually don't do the Sun to scale when they do their model. They do it smaller. And they'll use distances between planets that are not to scale for the real distances from the sun.\n\nThat's the straight answer. Use artistic license, since using scale is not practical.
161565
Because it has been darkest for longest at this time. Why is the high at around 6:00 pm? same reason. The sun has been at its peak for longest then.
589675
Yes many stars ar bigger than the Sun. The Sun is a middle aged small to mid sized star. Some of the really giant stars would even overlap the earth's orbit if they were placed where the Sun is. \n\nRefer the following links for some more info on stars.
566076
The sun rays expand when it goes further and further, so more area to cover from the sun on the land, thats the part that is hot. go further up and the rays are thinner hence cooler.
1027317
You mean the moon and the sun, which is true\nsometimes, but there are also eclipses where\nthe moon is smaller than the sun, so a small\nring of light is left uncovered (called an annular\neclipse)...\n\nBy a stroke of amazing coincidence, both the\nmoon and the sun are approx 108 times as\nfar from the earth as their diameter, so they\nappear the same size in the sky... 108 is a\nmystic number in spirituality, so I doubt if this\nis really a coincidence!
31931
It all has to do with your distance from the sun.
1146317
One question at a time.\n\nThe first one has been answered. Becasue of the earths tilt, countries in the southern hemisphere are closer to the sun in December than the countries in the northern hemisphere - that is why we have winer here (its further away). And when the earth goes around to the other side of its orbit around the sun in July, we in the northern hemisphere are closer, while they are farther. \n\nThis the general rule, however there are many other factors like elevation, precipitation, wind patterns, jet streams, ocean currents etc etc. so yes - every country in the northern hemisphere it is officially summer in july etc. but not necessarily as warm as some other countries can get. and vice versa for the southern hemisphere of course.\n\nAll of us - when we stand up, we are perpendicular to the earths surface no matter where we are. Imagine a ball ... and pins sticking straight out of the ball. This is how we'd look, so to a person on the south POLE, would be upside down to someone on the north POLE. or someone in one area, will be upside to someone else DIRECTLY on the other side the earth's surface. Everyone else will be in varying degrees of "upsidedownness"\n\nDaylight savings time is a pure man made concept. But again ... because of the tilt of the earth, during July etc. the sun shines longer on the northern hemisphere (The days are longer) and the southern hemisphere the days are shorter. This causes the sun to rise earlier and earlier and then after the longest day of the year, it reverses - the days get shorter and shorter. \n\nNow what happens is that you can wake up at 6 am and it still be pitch dark and 7 am it starts to rise and 8 am its fully light. So they change the time to go an hour back (Fall Back) and this allows the time now to be 5 am as pitch dark, 6 am start rise, and 7 am fully light. So for people who wake up at 7 am everyday, the first plan it will be kinda  dark when they wake up but with daylight savings, it will be fully light when they wake up! Thus its just something certain countries do to be able to have light for when most people wake up in the morning - even if you are not a mornig person - about 90% of people wake up at that time to to go to work\n\nHope all this made sense and email me at alxsml@yahoo.com for more clarification.
1027284
because the sun's gravitational pull is much greater than the earth's...same reason the moon goes around the earth and not the other way around