foo.diff

diff --git a/js/maps/solar_system.js b/js/maps/solar_system.js
index ea5dd0b..d464e79 100644
--- a/js/maps/solar_system.js
+++ b/js/maps/solar_system.js
@@ -17,6 +17,9 @@ var SolarSystem = function() {
     low_moon_orbit: new Node('Low Moon Orbit'),
     moon: new Node('Moon'),
     earth_transfer: new Node('Earth Transfer'),
+    venus_transfer: new Node('Venus Transfer'),
+    low_venus_orbit: new Node('Low Venus Orbit'),
+    venus: new Node('Venus'),
     mars_transfer: new Node('Mars Transfer'),
     low_mars_orbit: new Node('Low Mars Orbit'),
     mars: new Node('Mars'),
@@ -36,6 +39,9 @@ var SolarSystem = function() {
     moon_transfer_low_moon_orbit: newEdge({ deltav: 680, name: 'moon_transfer-low_moon_orbit' }),
     low_moon_orbit_moon_landing: newEdge({ deltav: 1730, name: 'low_moon_orbit-moon_landing' }),
     low_earth_orbit_earth_transfer: newEdge({ deltav: 3210, name: 'low_earth_orbit-earth_transfer' }),
+    earth_transfer_venus_transfer: newEdge({ deltav: 640, name: 'earth_transfer-venus_transfer' }),
+    venus_transfer_low_venus_orbit: newEdge({ deltav: 2940, name: 'venus_transfer-low_venus_orbit' }),
+    low_venus_orbit_venus_landing: newEdge({ deltav: 2000, name: 'low_venus_orbit-venus_landing' }),
     earth_transfer_mars_transfer: newEdge({ deltav: 1060, name: 'earth_transfer-mars_transfer' }),
     mars_transfer_low_mars_orbit: newEdge({ deltav: 1440, name: 'mars_transfer-low_mars_orbit' }),
     low_mars_orbit_mars_landing: newEdge({ deltav: 2000, name: 'low_mars_orbit-mars_landing' }),
@@ -56,6 +62,7 @@ SolarSystem.prototype = {
   },
 
   buildGraph: function(graph, edges, nodes) {
+    // earth
     graph.addEdge(edges.low_earth_orbit, nodes.earth, nodes.low_earth_orbit);
 
     graph.addEdge(edges.low_earth_orbit_geostationary_transfer, nodes.low_earth_orbit, nodes.geostationary_transfer);
@@ -66,8 +73,14 @@ SolarSystem.prototype = {
     graph.addEdge(edges.low_moon_orbit_moon_landing, nodes.low_moon_orbit, nodes.moon);
 
     graph.addEdge(edges.low_earth_orbit_earth_transfer, nodes.low_earth_orbit, nodes.earth_transfer);
-    graph.addEdge(edges.earth_transfer_mars_transfer, nodes.earth_transfer, nodes.mars_transfer);
 
+    // venus
+    graph.addEdge(edges.earth_transfer_venus_transfer, nodes.earth_transfer, nodes.venus_transfer);
+    graph.addEdge(edges.venus_transfer_low_venus_orbit, nodes.venus_transfer, nodes.low_venus_orbit);
+    graph.addEdge(edges.low_venus_orbit_venus_landing, nodes.low_venus_orbit, nodes.venus);
+
+    // mars
+    graph.addEdge(edges.earth_transfer_mars_transfer, nodes.earth_transfer, nodes.mars_transfer);
     graph.addEdge(edges.mars_transfer_low_mars_orbit, nodes.mars_transfer, nodes.low_mars_orbit);
     graph.addEdge(edges.low_mars_orbit_mars_landing, nodes.low_mars_orbit, nodes.mars);
 
diff --git a/test/solar_system.js b/test/solar_system.js
index 5cd1f48..3e8289a 100644
--- a/test/solar_system.js
+++ b/test/solar_system.js
@@ -42,6 +42,38 @@ describe("one-way trips from earth", function() {
     });
   });
 
+  describe("to venutian space", function() {
+    it("calculates the delta-v to venus transfer orbit", function() {
+      var total_value = graph.walk(nodes.earth, nodes.venus_transfer);
+      var expected_value = edges.low_earth_orbit.value +
+        edges.low_earth_orbit_earth_transfer.value +
+        edges.earth_transfer_venus_transfer.value;
+
+      expect(total_value).to.equal(expected_value);
+    });
+
+    it("calculates the delta-v to low venus orbit", function() {
+      var total_value = graph.walk(nodes.earth, nodes.low_venus_orbit);
+      var expected_value = edges.low_earth_orbit.value +
+        edges.low_earth_orbit_earth_transfer.value +
+        edges.earth_transfer_venus_transfer.value +
+        edges.venus_transfer_low_venus_orbit.value;
+
+      expect(total_value).to.equal(expected_value);
+    });
+
+    it("calculates the delta-v to a venus landing", function() {
+      var total_value = graph.walk(nodes.earth, nodes.venus);
+      var expected_value = edges.low_earth_orbit.value +
+        edges.low_earth_orbit_earth_transfer.value +
+        edges.earth_transfer_venus_transfer.value +
+        edges.venus_transfer_low_venus_orbit.value +
+        edges.low_venus_orbit_venus_landing.value;
+
+      expect(total_value).to.equal(expected_value);
+    });
+  });
+
   describe("to martian space", function() {
     it("calculates the delta-v to mars transfer orbit", function() {
       var total_value = graph.walk(nodes.earth, nodes.mars_transfer);