Celestial Object Archives - Page 11 of 13 -
Mercury is the closest planet to the Sun and due to its proximity it is not easily seen except during twilight. For every two orbits of the Sun, Mercury completes three rotations about its axis and up until 1965 it was thought that the same side of Mercury constantly faced the Sun.
The Sun or Sol, is the star at the centre of our solar system and is responsible for the Earth’s climate and weather. The Sun is an almost perfect sphere with a difference of just 10km in diameter between the poles and the equator. The average radius of the Sun is 695,508 km (109.2 x that of the Earth) of which 20–25% is the core
Exoplanets or “extrasolar planets” are planets found outside our solar system. They are designated by affixing a lowercase letter, starting from “b” towards “z” depending on order of discovery, to their parent star’s Flamsteed designation or catalogue numbers. So, most remarkable exoplanets ever discovered:
A blood red moon has been seen throughout history as a sign of impending doom. However, they are simply the result of a lunar eclipse, or when the Earth is aligned between the moon and the sun. Be they white, grey, orange, or red, a lunar eclipse is a spectacular vision. Here are several outstanding images of lunar eclipses from Earth – and beyond.
Astronomers are edging closer to discovering how the universe’s most supermassive black holes form — by studying the smallest galaxies.
Massive stars are fascinating objects, and I like to call them the “queens” of the stars because they truly rule all aspects of life in every galaxy. They eject huge quantities of material throughout their lives in flows called stellar winds. The exact properties of such winds still remain uncertain, with values for the rates of mass-loss differing by up to two orders of magnitude.
In the late 18th century, two scientists (John Michell and Pierre Simon Laplace) separately theorized that a star could be so massive that not even light could escape its surface. But nothing more was made of these “dark stars” until the 20th century, when Albert Einstein published his general theory of relativity.
All observers in the Northern Hemisphere will notice, this week, with the naked eye, the planet Jupiter, which will become the brightest object in the evening sky.
The asteroid 2014 DX110, which is 98ft (30m) across, will pass less than 1 lunar distance from Earth, offering an interesting show for those who want to pursue it through a telescope.
An international team of astrophysicists has identified a planet thats 13 times bigger than “our” Jupiter, the largest planet in our solar system.
An exotic planet, from the outside solar system, is floating alone through space without orbiting a star, was discovered by a team of astronomers, according to a study published in the United States.