The 20th century witnessed two great cosmological discoveries: The Cosmic Background Radiation corresponding to a black body temperature , and the expansion of the universe expressed by the cosmological version of Hubble's empirical law of 1929. In this paper we propose a pedagogical reconstruction in class of the original Hubble's law with a hands-on approach making use of modern resources freely available on the web.
Keywords:
Hubble's law; redshift; expansion of the universe
| vel. radial (cz) | conclusão | ||
|---|---|---|---|
| ; | ; | desloc. p/ o azul | |
| ; | ; | desloc. p/ o vermelho |
| Galáxia (NGC) | Distância (Mpc) | Vel. (km/s) |
|---|---|---|
| S. Mag | 0,032 | 170 |
| L. Mag | 0,034 | 290 |
| 6822 | 0,214 | -130 |
| 598 | 0,263 | -70 |
| 221 | 0,275 | -185 |
| 224 | 0,275 | -220 |
| 5457 | 0,45 | 200 |
| 4736 | 0,5 | 290 |
| 5194 | 0,5 | 270 |
| 4449 | 0,63 | 200 |
| 4214 | 0,8 | 300 |
| 3031 | 0,9 | -30 |
| 3627 | 0,9 | 650 |
| 4826 | 0,9 | 150 |
| 5236 | 0,9 | 500 |
| 1068 | 1,0 | 920 |
| 5055 | 1,1 | 450 |
| 7331 | 1,1 | 500 |
| 4258 | 1,4 | 500 |
| 4251 | 1,7 | 960 |
| 4382 | 2,0 | 500 |
| 4472 | 2,0 | 850 |
| 4486 | 2,0 | 800 |
| 4649 | 2,0 | 1090 |
| Galáxia (NGC) | Distância (Mpc) | Vel. (km/s) |
|---|---|---|
| S. Mag | 0,063 | 158 |
| L. Mag | 0,050 | 278 |
| 6822 | 0,520 | -77 |
| 598 | 0,869 | -179 |
| 221 | 0,768 | -200 |
| 224 | 0,275 | -220 |
| 5457 | 6,855, | 241 |
| 4736 | 5,107 | 308 |
| 5194 | 7,185 | 463 |
| 4449 | 3,864 | 207 |
| 4214 | 2,979 | 291 |
| 3031 | 3,674 | -34 |
| 3627 | 9,592 | 727 |
| 4826 | 5,405 | 408 |
| 5236 | 6,422 | 513 |
| 1068 | 10,582 | 1137 |
| 5055 | 7,718 | 484 |
| 7331 | 13,444 | 816 |
| 4258 | 7,276 | 448 |
| 4251 | 14,732 | 1066 |
| 4382 | 15,243 | 729 |
| 4472 | 16,031 | 981 |
| 4486 | 16,747 | 1284 |
| 4649 | 16,926 | 1110 |
