1 min readSpitzer Valentines DayNASAFeb 14, 2017 Image Article This illustration shows how the planet HAT-P-2b, left, appears to cause heartbeat-like pulsations in its host star, HAT-P-2. This illustration shows how the planet HAT-P-2b, left, appears to cause heartbeat-like pulsations in its host star, HAT-P-2. Credit: NASA/JPL-Caltech