Can we detect a blueshift of -c?
in [Physics]
|
Prev: The best we can get for a standard model
Next: A blue·shifted photon is “spun up”; its frequency goes up.
From: Anthony Buckland on 25 Apr 2010 22:10 "Brad Guth" <bradguth(a)gmail.com> wrote in message news:d0979a19-3038-4e45-887b-d6967af86803(a)z21g2000pre.googlegroups.com... >If something substantial (such as a 10 solar mass super-star and its >tidal associated swarm of Jupiter+ planets w/moons) was headed as >seemingly directly towards us at -c (-299.8e3 km/sec), could that item >regardless of size, mass and vibrance of energy be detected? >... Since it's substantial, the best that can be managed is slightly less than -c. When the first photons of its approach to us were detected by us, it would actually be much closer than it appeared. We would have very little time to react. We would almost surely be doomed. Very soon.
From: BURT on 25 Apr 2010 22:36 On Apr 25, 7:10 pm, "Anthony Buckland" <anthonybucklandnos...(a)telus.net> wrote: > "Brad Guth" <bradg...(a)gmail.com> wrote in message > > news:d0979a19-3038-4e45-887b-d6967af86803(a)z21g2000pre.googlegroups.com... > > >If something substantial (such as a 10 solar mass super-star and its > >tidal associated swarm of Jupiter+ planets w/moons) was headed as > >seemingly directly towards us at -c (-299.8e3 km/sec), could that item > >regardless of size, mass and vibrance of energy be detected? > >... > > Since it's substantial, the best that can be managed is > slightly less than -c. When the first photons of its > approach to us were detected by us, it would actually > be much closer than it appeared. We would have > very little time to react. We would almost surely be > doomed. Very soon. Is a nearby supernova going to take us out? Science knows our future. Mitch Raemsch
From: dlzc on 25 Apr 2010 23:06 Dear BURT: On Apr 25, 7:36 pm, BURT <macromi...(a)yahoo.com> wrote: .... > Is a nearby supernova going to take us out? Likely nothing so impressive. Most likely famine and contagion will. > Science knows our future. Science presumes all is ultimately knowable. Except "why". David A. Smith
From: BURT on 25 Apr 2010 23:15 On Apr 25, 8:06 pm, dlzc <dl...(a)cox.net> wrote: > Dear BURT: > > On Apr 25, 7:36 pm, BURT <macromi...(a)yahoo.com> wrote: > ... > > > Is a nearby supernova going to take us out? > > Likely nothing so impressive. Most likely famine and contagion will. > > > Science knows our future. > > Science presumes all is ultimately knowable. Except "why". > > David A. Smith God is not going to let any planet die. Period. The Earth will be around forever.
From: Brad Guth on 26 Apr 2010 00:41
On Apr 25, 7:10 pm, "Anthony Buckland" <anthonybucklandnos...(a)telus.net> wrote: > "Brad Guth" <bradg...(a)gmail.com> wrote in message > > news:d0979a19-3038-4e45-887b-d6967af86803(a)z21g2000pre.googlegroups.com... > > >If something substantial (such as a 10 solar mass super-star and its > >tidal associated swarm of Jupiter+ planets w/moons) was headed as > >seemingly directly towards us at -c (-299.8e3 km/sec), could that item > >regardless of size, mass and vibrance of energy be detected? > >... > > Since it's substantial, the best that can be managed is > slightly less than -c. When the first photons of its > approach to us were detected by us, it would actually > be much closer than it appeared. We would have > very little time to react. We would almost surely be > doomed. Very soon. Our sun has a 1 ly radii Oort cloud. Perhaps a 10 solar mass star would have an even greater Oort cloud radii of at least twice that much. ~ BG |