The way galaxies assemble their mass to form the well-defined Hubble sequence is amongst the most debated topic in modern cosmology. One difficulty is to link distant galaxies, which emitted their light several Gyr ago, to those at present epoch. Such a link is affected by the evolution or ...
How Filaments are Woven into the Cosmic Web Observations indicate galaxies are distributed in a filament-dominated web-like structure. Numerical experiments at high and low redshift of viable structu... JR Bond,L Kofman,D Pogosyan 被引量: 303发表: 1995年 Galaxies in filaments have more ...
Though quite a bit worse for wear, the LMC still retains a compact, stubby halo of gas – something that it wouldn’t have been able to hold onto gravitationally had it been less massive. The LMC is 10 percent the mass of the Milky Way, making it heftier than most dwarf galaxies. “...
Those who criticise the notion of Indigenous science will arguet hat culture is irrelevant to science, that the behaviour of atoms or the formation of galaxies is not based on culture.But the rules that govern nature are distinct from the process by which we come to learn about them.That is...
aFor thousands of years, people have used stars as a means of navigating. They have also fostered some of our most common myths. Astronomers have created 88 groupings of stars and galaxies into what are called constellations. Learning the constellations is very interesting especially for anyone ...
What are the dimensions of the Hubble Telescope? How many galaxies are in the observable universe? How many solar radii fit within one astronomical unit? How many light years is the Oort cloud from Earth? How was an astronomical unit first measured?
During alunar eclipse, Earth passes between the sun and the moon, allowing Earth to cast its shadow on the moon. That shadow is always, always, always a circle, no matter where you are on the planet, no matter the timing of the eclipse. Always. ...
Complex organic molecules are defined as molecules that contain six or more atoms, with at least one of them carbon. For example, in 2017 astronomers used ALMA to probe the young multiple-star system IRAS 16293-2422, which lies about 400 light-years away. ALMA detected methyl isocyanate in ...
polarization;magnetic fields;galaxies;galaxy clusters;numerical simulations 1. Introduction Cosmic magnetism is one of five scientific cases that drove the design and the construction of the Square Kilometer Array1(SKA). Magnetic fields are enigmatically ubiquitous in the universe [1], and clear signatu...
Now consider the distances from your office to various galaxies. If the distance is sufficiently great, your ruler is of no use, because you cannot distinguish whether a particular galaxy moves farther away by one ruler unit. Instead, for two distant galaxies, you can measure the ratio of dis...