◆ Mercury  Mercury is the 1st planet in the solar system, a rocky world. # ############### ##################### ######################### ########################### ############################# ############################### ############################### ################################# ############################### ############################### ############################# ########################### ######################### ##################### ############### #  Type Planet  Symbol ☿  Magnitude -0.2  Distance 0.97 AU, 8 light-minutes  Apparent size 7″  Illuminated 51%   Physical  Radius 2,439 km, 0.38 of Earth's  Mass 0.055 of Earth's  Density 5.43 g/cm3  Surface gravity 3.7 m/s2, 0.38x Earth's  Escape velocity 4.4 km/s  Day 58.6 Earth days  Year 88 Earth days  Albedo 0.11, reflects 11% of the light hitting it  Temperature 440 K, 167 C   History  Moons none  Discovered known since antiquity  First visited Mariner 10, 1974  Missions Mariner 10, MESSENGER, BepiColombo  40.00,-83.00 now · 59° up in the WSW · mag -0.2 · ↑ 05:04 ↓ 19:34 ⌃ 12:19  Mercury is not visible from 40.00,-83.00: the sky is still too bright.  It is only 19° from the Sun: too deep in the glare, and it stays that way for weeks.   It is currently crossing Gemini.   It is 0.97 AU away, which is 8 light-minutes, so you are seeing it as it was 8 minutes ago.   It sits 19° from the Sun, so it is a morning object.   The disc is 7 arcseconds across, 51% lit.  Follow @skymapsh for skymap.sh updates