|Planetary System Info|
|Star Type||M4V (205 hours)|
|Position in System||1st (of 5)|
|Time to Jump Point||2.56 Days|
|HPG Facility Class||A|
|Percent, Level of Native Life||20%, Plants|
(References to Summer)
Note: X and Y are coordinates (light years on XY plane) relative to Terra at (0, 0)
X: -44.43 Y: 26.25[e]
- Number of Satellites: 1 (Niflheim)
- Surface Gravity: 1.03
- Atm. Pressure: Standard (Breathable)
- Equatorial Temperature: 42° C (Tropical)
- Surface Water: 77 percent
 Era Specific Data
- Noble Ruler: Aldo Lestrade, Duke of Summer
- Political Leader: Clan Leader Jeffrey Hayne
- ComStar Representative: Precentor Dewayne Vetters
- Noble Ruler: Duke Genovese Hayne
- Population: 2,561,000,000
- Socio-Industrial Levels/USIIR: B-B-A-B-F
- Population: 894,000,000
- Governor: Minerva Hyne
- Planetary Legate: Carlos Adler
 Garrisoning Military Force
 Owner History
- 2596 - Terran Hegemony 
- 2750 - Terran Hegemony 
- 2765 - Terran Hegemony 
- 3025 - Lyran Commonwealth
- 3030 - Lyran Commonwealth
- 3040 - Federated Commonwealth
- 3052 - Federated Commonwealth
- 3057 - Lyran Alliance
- 3062 - Lyran Alliance
- 3068 - Free Worlds League (from October)
- 3069 - Lyran Alliance 
- 3130 - Republic of the Sphere 
 Planetary History
Following the invasion of the Free Worlds League by the Skye and Bolan Provinces of the Lyran Alliance in what was termed Operation ÜBERSCHATTEN, Marshall Jeremy Brett took command of the local FWLM and launched a counteroffensive, under the name Operation BROKEN FIST. BROKEN FIST went beyond simply attempting to recapture worlds that the Lyrans had seized, striking into Lyran space at numerous worlds. Summer was one of the worlds hit and was attacked by the League forces on the 1st of September 3068. The League would keep control of Summer until the 7th of January 3069, when Lyran Alliance forces recaptured the planet.
On the 27th of September 3069 ComStar forces were mustering on Summer when the planet came under attack from Word of Blake forces. The Blakist attack used Pocket WarShips and AeroSpace Fighters to attack the planet and as a part of their attack used a powerful nuclear weapon to destroy Curitiba, the planetary capital city, along with the bulk of the ComStar and LAAF units on the planet. Despite the damage dealt to Summer's defenders, the Word of Blake didn't attempt to occupy the planet, but instead simply moved on.
 Nearby Planets
Planets within 2 jumps (60 light-years). Closest planets first:
- ↑ 1.0 1.1 Handbook: House Steiner, p. 90, "Planet Profile"
- ↑ House Steiner (The Lyran Commonwealth, p. 169, "Planet Guide"
- ↑ 3.0 3.1 Dark Age: Republic Worlds, p. 195, "World Profile"
- ↑ House Steiner (The Lyran Commonwealth), p. 117 - "Unit Deployment Table"
- ↑ Historical: War of 3039 p. 141
- ↑ 20 Year Update, p. 27 - "Federated Commonwealth Deployment Table"
- ↑ Objective Raids, p. 19 - "FedCom Deployment Table"
- ↑ 8.0 8.1 Historical: Reunification War, p. 159, "Inner Sphere - 2596"
- ↑ Era Report: 2750, p. 37, "Inner Sphere - 2750"
- ↑ Historical: Liberation of Terra Volume 1, p. 11, "Inner Sphere - 2765"
- ↑ 11.0 11.1 11.2 Jihad: Final Reckoning, p. 46, "The Jihad In Review"
- ↑ Map of the Inner Sphere 3130
- ↑ Jihad: Final Reckoning, p. 47, "The Jihad In Review"