blue hypergiant starsBut the hottest known stars in the Universe are the blue hypergiant stars. These are stars with more than 100 times the mass of the Sun. One of the best known examples is Eta Carinae, located about 7,500 light-years from the Sun.
Proxima CentauriDistance Information Proxima Centauri, the closest star to our own, is still 40,208,000,000,000 km away. (Or about 268,770 AU.)08-Dec-2020
Stars are different colors — white, blue, yellow, orange, and red. The color indicates the star’s temperature in its photosphere, the layer where the star emits most of its visible light.
A mirror might look silver because it’s usually depicted that way in books or movies. However, it’s actually the color of whatever is reflected onto it. A perfect mirror has specular reflection, meaning it reflects all light in a single direction equal to what it receive
The Sun has been called by many names. The Latin word for Sun is “sol,” which is the main adjective for all things Sun-related: solar. Helios, the Sun god in ancient Greek mythology, lends his name to many Sun-related terms as well, such as heliosphere and helioseismology.
The human brain color physically appears to be white, black, and red-pinkish while it is alive and pulsating. Images of pink brains are relative to its actual state. The brains we see in movies are detached from the blood and oxygen flow result to exhibit white, gray, or have a yellow shadow.
The temperature of the sun’s surface is about 6,000 degrees C, which means it’s much cooler than the core.
When the molten outer core cools and becomes solid, a very long time in the future, the Earth’s magnetic field will disappear. When that happens, compasses will stop pointing north, birds will not know where to fly when they migrate, and the Earth’s atmosphere will disappear.
Short answer: Technically it’s possible that the Earth and Moon could collide in the very distant future, but it’s very unlikely. It’s certainly not going to happen while any of us are alive. Long answer: The Moon is in a stable orbit around Earth.
The solid spheroid that comprises the inner core of the Earth is made of different metals, specifically, mostly iron and nickel. Siderophiles, or elements that dissolve in iron, are also found in the inner core. These elements include gold, cobalt, and platinum. Most of the Earth’s sulfur is in the core as well.
