diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..723ef36
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea
\ No newline at end of file
diff --git a/conversions.go b/conversions.go
index 7f488ca..0ed0329 100644
--- a/conversions.go
+++ b/conversions.go
@@ -105,7 +105,7 @@ func LatLongDeg(rad LatLong) (deg LatLong) {
 	}
 
 	if rad.Latitude < (-math.Pi/2) || rad.Latitude > math.Pi/2 {
-		log.Fatal("Latitude not within bounds -pi/2 to +pi/2")
+		log.Panic("Latitude not within bounds -pi/2 to +pi/2")
 	}
 	deg.Latitude = (rad.Latitude / math.Pi * 180)
 	return
diff --git a/gravity.go b/gravity.go
index 8ea0045..0902616 100644
--- a/gravity.go
+++ b/gravity.go
@@ -49,7 +49,7 @@ func getGravConst(name Gravity) (grav GravConst) {
 		grav.j4 = -0.00000161098761
 		grav.j3oj2 = grav.j3 / grav.j2
 	default:
-		log.Fatal(name, "is not a valid gravity model")
+		log.Panic(name, "is not a valid gravity model")
 	}
 
 	return
diff --git a/helpers.go b/helpers.go
index 55f5433..0d38411 100644
--- a/helpers.go
+++ b/helpers.go
@@ -94,7 +94,7 @@ func TLEToSat(line1, line2 string, gravConst Gravity) Satellite {
 func parseFloat(strIn string) (ret float64) {
 	ret, err := strconv.ParseFloat(strIn, 64)
 	if err != nil {
-		log.Fatal(err)
+		log.Panic(err)
 	}
 	return ret
 }
@@ -103,7 +103,7 @@ func parseFloat(strIn string) (ret float64) {
 func parseInt(strIn string) (ret int64) {
 	ret, err := strconv.ParseInt(strIn, 10, 0)
 	if err != nil {
-		log.Fatal(err)
+		log.Panic(err)
 	}
 	return ret
 }