Bow Shock Theory For Earth's Sun
It was hypothesised that the Sun also has a bow shock as it travels through the interstellar medium. This will occur if the interstellar medium is moving supersonically towards the Sun, since the sun's solar wind is moving supersonically away from the Sun. The point where the interstellar medium becomes subsonic is the bow shock; the point where the interstellar medium and solar wind pressures balance is at the heliopause; the point where the solar wind becomes subsonic is the termination shock. According to Robert Nemiroff and Jerry Bonnell of NASA, the solar bow shock may lie at around 230 AU from the Sun. However, data in 2012 from NASA's Interstellar Boundary Explorer (IBEX) and corroborated with results from the Voyagers, has found that due to refinements in the relative speed of the heliosphere and the local interstellar magnetic field strength it is believed the heliosphere is prevented from forming a bow shock in the region of our galaxy our sun is currently passing through.
Read more about this topic: Bow Shock
Famous quotes containing the words bow, shock, theory, earth and/or sun:
“A stranger came one night to Yussouf’s tent,
Saying, “Behold one outcast and in dread,
Against whose life the bow of power is bent,
Who flies, and hath not where to lay his head;
I come to thee for shelter and for food,
To Yussouf, called through all our tribes ‘he Good.’ “
“This tent is mine,” said Yussouf, “but no more
Than it is God’s; come in, and be at peace;”
—James Russell Lowell (1819–1891)
“Civilized society is one huge bourgeoisie: no nobleman dares now shock his greengrocer.”
—George Bernard Shaw (1856–1950)
“It is not enough for theory to describe and analyse, it must itself be an event in the universe it describes. In order to do this theory must partake of and become the acceleration of this logic. It must tear itself from all referents and take pride only in the future. Theory must operate on time at the cost of a deliberate distortion of present reality.”
—Jean Baudrillard (b. 1929)
“Night is a curious child, wandering
Between earth and sky, creeping
In windows and doors, daubing
The entire neighborhood
With purple paint.”
—Frank Marshall Davis (b. 1905)
“And yet the sun pardons our voices still,
And berries in the hedge
Through all the nights of rain have come to the full,
And death seems like long hills, a range
We ride each day towards, and never reach.”
—Philip Larkin (1922–1986)