Back to the Beginning of Time - Revision history

WikiSysop at 18:38, 19 March 2012

2012-03-19T18:38:05Z

← Older revision		Revision as of 18:38, 19 March 2012
Line 1:		Line 1:
	We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.		We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.

	If you need one, click this for a [http://web2.0calc.com/ web scientific calculator]. It accepts power of ten numbers. For example, to enter 3x10<sup>5</sup> you could write 300000 or 3e5.		If you need one, click this for a [http://web2.0calc.com/ web scientific calculator]. It accepts power of ten numbers. For example, to enter 3x10<sup>5</sup> you could write 300000 or 3e5 in the calculator window. This web site also offers some help with college math.

WikiSysop at 18:37, 19 March 2012

2012-03-19T18:37:09Z

← Older revision		Revision as of 18:37, 19 March 2012
Line 1:		Line 1:
	We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.		We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.

	If you need one, click this for a [http://web2.0calc.com/ web scientific calculator].		If you need one, click this for a [http://web2.0calc.com/ web scientific calculator]. It accepts power of ten numbers. For example, to enter 3x10<sup>5</sup> you could write 300000 or 3e5.

WikiSysop: /* Hercules Cluster of Galaxies */

2012-03-19T18:34:22Z

Hercules Cluster of Galaxies

← Older revision		Revision as of 18:34, 19 March 2012
Line 95:		Line 95:
	</center>		</center>

	Since there are 3.16x10<sup>7</sup> seconds in a year, we find it took 1.~~39x1010~~ or 13,900,000,000 years for the galaxy cluster to reach 154 Mpc. That is, the Hercules cluster of galaxies started its journey over '''13 billion years ago''' !!!		Since there are 3.16x10<sup>7</sup> seconds in a year, we find it took 1.39x10<sup>10</sup> or 13,900,000,000 years for the galaxy cluster to reach 154 Mpc. That is, the Hercules cluster of galaxies started its journey over '''13 billion years ago''' !!!

	== Corona Borealis ==		== Corona Borealis ==

WikiSysop: /* Virgo Cluster of Galaxies */

2012-03-19T18:33:22Z

Virgo Cluster of Galaxies

← Older revision		Revision as of 18:33, 19 March 2012
Line 10:		Line 10:
	The Virgo cluster's velocity is 1143 km/s and its distance is 16 Mpc.		The Virgo cluster's velocity is 1143 km/s and its distance is 16 Mpc.

	[[File:virgo_cluster_z.jpg\|600px\|center]]]		[[File:virgo_cluster_z.jpg\|600px\|center]]

WikiSysop at 18:32, 19 March 2012

2012-03-19T18:32:51Z

← Older revision		Revision as of 18:32, 19 March 2012
Line 1:		Line 1:
	We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.		We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.

	If you need one, click this for a [http://web2.0calc.com~~/widgets/horizontal~~/ web scientific calculator].		If you need one, click this for a [http://web2.0calc.com/ web scientific calculator].

WikiSysop at 18:31, 19 March 2012

2012-03-19T18:31:56Z

← Older revision		Revision as of 18:31, 19 March 2012
Line 1:		Line 1:
	We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.		We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.

	~~Here's a calculator if~~ you need one.		If you need one, click this for a [http://web2.0calc.com/widgets/horizontal/ web scientific calculator].

	~~<iframe width="590" height="390" src="http://web2.0calc.com/widgets/horizontal/" scrolling="no" style="border: 1px solid silver; "> </iframe>~~
	~~<br />~~
	~~<a href="http://web2.0calc.com/">web 2.0 scientific calculator</a>~~

WikiSysop at 18:30, 19 March 2012

2012-03-19T18:30:27Z

← Older revision		Revision as of 18:30, 19 March 2012
Line 1:		Line 1:
	We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.		We know if we have traveled 100 miles steadily at 50 miles per hour, we must have left 2 hours earlier. From the redshift '''z''' we have learned how to find the velocity '''v'''. From the Hubble Law we have learned we have learned the distance '''d''' for several galaxy clusters. We should be able to learn when each one left us.

			Here's a calculator if you need one.

			<iframe width="590" height="390" src="http://web2.0calc.com/widgets/horizontal/" scrolling="no" style="border: 1px solid silver; "> </iframe>
			<br />
			<a href="http://web2.0calc.com/">web 2.0 scientific calculator</a>

WikiSysop: /* The Beginning of Time */

2012-03-19T18:27:15Z

The Beginning of Time

← Older revision		Revision as of 18:27, 19 March 2012
Line 116:		Line 116:


	Every cluster of galaxies began moving away from us at the '''same ~~momen~~'''t ... from the '''same place''' ... from the '''BIG BANG'''!!!		Every cluster of galaxies began moving away from us at the '''same moment''' ... from the '''same place''' ... from the '''BIG BANG'''!!!

WikiSysop: /* Virgo Cluster of Galaxies */

2012-03-19T18:26:51Z

Virgo Cluster of Galaxies

← Older revision		Revision as of 18:26, 19 March 2012
Line 33:		Line 33:

	<center>		<center>
	distance 4.94 x ~~1020~~ km / speed 1143 km/s = 4.32 x 10<sup>17</sup> seconds		distance 4.94 x 10<sup>20</sup> km / speed 1143 km/s = 4.32 x 10<sup>17</sup> seconds
	</center>		</center>

WikiSysop: /* Hydra Cluster of Galaxies */

2012-03-19T18:26:16Z

Hydra Cluster of Galaxies

← Older revision		Revision as of 18:26, 19 March 2012
Line 56:		Line 56:
	The first step is to convert the distance in Mpc to km. Since a megaparsec is 3.09 x 10<sup>19</sup> km, we just multiply 49 x 3.09 x 10<sup>19</sup>		The first step is to convert the distance in Mpc to km. Since a megaparsec is 3.09 x 10<sup>19</sup> km, we just multiply 49 x 3.09 x 10<sup>19</sup>

			<center>
	49 Mpc must be 1.51 x 10<sup>21</sup> km		49 Mpc must be 1.51 x 10<sup>21</sup> km
			</center>

	We divide the distance 1.51 x 10<sup>21</sup> km by the speed 3420 km/s, and find it took the galaxy cluster 4.42x10<sup>17</sup>seconds to travel 49 Mpc. Since there are 3.16x10<sup>7</sup> seconds in a year, it took 1.39x10<sup>10</sup> or 13.9 billion years for the galaxy cluster to reach 49 Mpc. That is, the Hydra cluster of galaxies started its journey over '''13 billion years ago''' !!!		We divide the distance 1.51 x 10<sup>21</sup> km by the speed 3420 km/s, and find it took the galaxy cluster 4.42x10<sup>17</sup>seconds to travel 49 Mpc. Since there are 3.16x10<sup>7</sup> seconds in a year, it took 1.39x10<sup>10</sup> or 13.9 billion years for the galaxy cluster to reach 49 Mpc. That is, the Hydra cluster of galaxies started its journey over '''13 billion years ago''' !!!



	== Coma Cluster of Galaxies ==		== Coma Cluster of Galaxies ==