The Skyhound's Guide to Deep Sky Objects What is a deep sky object? Generally speaking it's any object in the sky that isn't a star or in our solar system. Most deep sky objects are faint, diffuse and require a telescope to see. Science’s Looming ‘Tipping Point’ It is essential in these exuberant times to pay critical attention to both the observational constraints and to the basic mathematical laws, with a clear sense of what is solid theory and what is only unsupported speculation. This seeming platitude is offered here without jest, because at the present time there are ‘theories’ – scenarios sometimes quite detailed – seriously and often passionately held, for almost every exotic astronomical object that is not resolved in the telescope. In contrast, the one star that can be properly resolved – the pedestrian Sun – exhibits a variety of phenomena that defy contemporary theoretical understanding.— Eugene N. Parker A ‘tipping point’ in science is supposed to happen when the weight of evidence against a theory tips the balance of opinion against it. But we are dazzled in this space age by computer-generated ‘virtual reality’ and the sheer technological brilliance of applied science.
The 5th state of matter Summary: beautiful filament-systems are often shown by the astonishing development of the modern astronomy. Most of these filaments have an exact circular cross section. Filaments have the same interesting characteristics from a diameter of 0.01 mm to that of many 1000 of light-years. Filaments are incorrectly seen to be of plasma, however, particles move in only one direction in them, often against gravity. In this non-thermal (fifth-) state of matter, particles have up to 1016 -times higher energy than those in the hottest stellar plasma.
What is apparent magnitude? The apparent magnitude of the Sun is listed as -26.74. I want to know what is the formula used to compute this? How is this figure of -26.74 arrived at? Can this formula be employed for calculating the apparent magnitudes of stars of different spectral types too? The idea of "apparent magnitude" goes all the way back to the Greek astronomer Hipparchus. Basically, he looked at the stars in the sky and classified them by how bright they appear -- the brightest stars were "magnitude 1", the next brightest were "magnitude 2", etc., down to "magnitude 6", which were the faintest stars he could see.
The Electric Universe Two of these four forces act in the atomic core. One of them UNIFIES and holds matter together in the core (e.g. via fusion), the other force SEPARATES parts of the atomic core. It produces the radioactivity of e.g. uranium and thorium (table). The other two forces of these four forces act in the infinite space. Grandfather paradox The grandfather paradox is a proposed paradox of time travel first described by the science fiction writer René Barjavel in his 1943 book Le Voyageur Imprudent (Future Times Three). The paradox is described as following: the time traveller went back in time to the time when his grandfather had not married yet. At that time, the time traveller kills his grandfather, and therefore, the time traveller is never born when he was meant to be. If he is never born, then he is unable to travel through time and kill his grandfather, which means he would be born, and so on. Despite the name, the grandfather paradox does not exclusively regard the impossibility of one's own birth. Rather, it regards any action that makes impossible the ability to travel back in time in the first place.
Aristotelian Biology The ancient Greek philosopher was the first scientist. VIKING ADULT, SEPTEMBER 2014In the Aegean Sea there is an island called Lesbos. It has pine-forested mountains, glades of chestnut trees, and valleys filled with blooming rhododendrons. Terrapins and eels navigate the rivers. In the spring and autumn, migrating birds pause there in the thousands as they travel between Africa and Europe. And there is the Lagoon.
Lagrange Points of the Earth-Moon System A mechanical system with three objects, say the Earth, Moon and Sun, constitutes a three-body problem. The three-body problem is famous in both mathematics and physics circles, and mathematicians in the 1950s finally managed an elegant proof that it is impossible to solve. However, approximate solutions can be very useful, particularly when the masses of the three objects differ greatly. For the Sun-Earth-Moon system, the Sun's mass is so dominant that it can be treated as a fixed object and the Earth-Moon system treated as a two-body system from the point of view of a reference frame orbiting the Sun with that system. 18th century mathematicians Leonhard Euler and Joseph-Louis Lagrange discovered that there were five special points in this rotating reference frame where a gravitational equilibrium could be maintained.