A selectively reflective panel for a non-orbital spacecraft with a thermal management system for controlling a temperature of the selectively reflective panel such that dynamically changing and highly variable thermal environment experienced by the non-orbital spacecraft traveling through outer space is managed, the thermal management system comprising: a first solar concentrator array (224, 302, 908) having a first plurality of reflectors (406, 1300) arranged in reflector groups (214, 240, 912), wherein the first solar concentrator array (224, 302) is located within the selectively reflective panel; a first temperature sensor (236a, 910a), which is located near to the first solar concentrator array (224, 302), configured to monitor a first local temperature of the selectively reflective panel close to the first solar concentrator array; and a controller (228, 916) in signal communication with the first temperature sensor (236a, 910a) and the first solar concentrator array (224, 302), wherein the controller (228, 916) is configured to monitor the first local temperature of the selectively reflective panel with the first temperature sensor (236a, 910a) and produce a first control signal (234, 322, 324) to position a first selected number of reflectors within the first solar concentrator array (224, 302) into an off-pointing position in response to monitoring the first temperature sensor, wherein the first selected number of reflectors is determined to control the first local temperature of the selectively reflective panel, and wherein the first solar concentrator array (224, 302, 908) is configured to position the first selected number of reflectors into the off-pointing position to control the first local temperature of the selectively reflective panel to prevent the selectively reflective panel for overheating. a first solar concentrator array (224, 302, 908) having a first plurality of reflectors (406, 1300) arranged in reflector groups (214, 240, 912), wherein the first solar concentrator array (224, 302) is located within the selectively reflective panel; a first temperature sensor (236a, 910a), which is located near to the first solar concentrator array (224, 302), configured to monitor a first local temperature of the selectively reflective panel close to the first solar concentrator array; and a controller (228, 916) in signal communication with the first temperature sensor (236a, 910a) and the first solar concentrator array (224, 302), wherein the controller (228, 916) is configured to monitor the first local temperature of the selectively reflective panel with the first temperature sensor (236a, 910a) and produce a first control signal (234, 322, 324) to position a first selected number of reflectors within the first solar concentrator array (224, 302) into an off-pointing position in response to monitoring the first temperature sensor, wherein the first selected number of reflectors is determined to control the first local temperature of the selectively reflective panel, and wherein the first solar concentrator array (224, 302, 908) is configured to position the first selected number of reflectors into the off-pointing position to control the first local temperature of the selectively reflective panel to prevent the selectively reflective panel for overheating.