How Does The Difference Between Constant Star And Blueshift Differ

Distant stars and distant galaxies aren’t completely featureless, but actually has specific spectral features. When we look at their spectrum, we can see an absorption of spectrum. Redshift and blueshift are two different terms that describe how the light changes as objects moves closer or further away from us. The reason that these two terms can describe whether or not objects moves closer or further away from us, is the fact that when a certain object in space is shifted to the red part of the spectrum, it defines the fact that the object is moving further away from us, while if a certain object is shifted towards the blue part of the spectrum, it defines that it is moving closer towards us.
Redshift is when the wavelength of light or other electromagnetic radiations are increased, or is shifted to the red part of the spectrum. That is equivalent to a lower frequency, and lower photon energy. While blueshift is when the wavelength of light or other electromagnetic radiations are decreased, shifting to the blue part of the spectrum. This means that there is a higher frequency and higher
The earth’s North Pole is actually pointed towards Polaris, the North Star, and the South Pole is pointed towards the constellation of Octans, and thereby the direction of the axis does not change. Therefore whilst the earth is orbiting around the sun, a certain area of the earth will be tilted towards the sun, whilst another area will be tilted away from the sun. For example, when the earth axis is tilted towards the sun, the northern hemisphere will be having more sunlight hours, more heat and summer, whilst the countries in the southern hemisphere will be having less sunlight hours, less heat and winter. But when the earth axis is tilted away from the sun, 6 months later, the northern hemisphere will have winter, whilst the countries in the southern hemisphere will be having