to them expressed in terms of radii of the earth's orbit, and also in radii of Neptune's orbit, which gives numbers more easily comprehended by us. TABLE VII.--LIST OF STARS WHOSE DISTANCES FROM THE SUN HAVE BEEN MEASURED, AND WHICH ARE ASSUMED TO BE HIS NEAREST NEIGHBOURS. --------------------+-----+------+----+------------------+-----------+ | M | P | | Distance. | | | a | r | P |---------+--------| | Star. | g | o | a | Sun's |Time of | Observers | | n | p M | r |Distance | its | | | i | e o | a | = 1. | Light | | | t | r t | l | |reaching| | | u | i | l | | Earth. | | | d | o | a | | | | | e | n | x | | | | | | (") | (")| |(years) | | --------------------+-----+------+----+---------+--------+-----------+ [Greek: a] Centauri | 1 | 3·67 |0·75| 275,000| 4·34 |Gill. | | | | | | | | 61 Cygni | 6 | 5·14 |0·50| 412,500| 6·51 |O. Struve. | | | | | | | | 21185 Lalande |7-1/4| 4·75 |0·50| 412,500| 6·51 |Winnecke. | | | | | | | | Sirius | 1 | 1·24 |0·38| 543,000| 8·57 |Gill. | | | | | | | | [Greek: m] Cassiopeiæ| | |0·34| 606,000| 9·57 |O. Struve. | | | | | | | | 34 Groombridge | 8 | 2·81 |0·29| 711,000| 11·23 |Auwers. | | | | | | | | 9352 Lacaille |7-1/2| 6·95 |0·28| 737,000| 11·62 |Gill. | | | | | | | | 21258 Lalande |8-1/2| 4·40 |0·26| 793,000| 12·52 |Krüger. | | | | | | | | Ö Arg. 17415 | 9 | 1·27 |0·25| 825,000| 13·02 |Krüger. | | | | | | | | [Greek: s] Draconis | 5 | 1·87 |0·25| 825,000| 13·02 |Brunnow. | | | | | | | | [Greek: e] Indi |5-1/4| 4·68 |0·22| 938,000| 14·80 |Gill. | | | | | | | | [Greek: a] Lyræ | 1 | 0·31 |0·20|1,031,000| 16·27 | |