Gravitational Waves Pillows

Description: Gravitational Waves (halftone).

Description: Gravitational Waves (light design).

Description: Gravity Waves (gray)

Description: This waveform (GW150914) is that of the first observation of gravitational waves on 2015-09-14. It was also the first observation of a binary black hole merger and demonstrates the existence of binary stellar-mass black hole systems.

Description: Funny astrophysics gift. Text says: Easily Distracted By gravitational waves. Great gift idea for the astrophysicist or astronomer.

Description: The force of gravity and the gravitational pull effect XL

Description: Penrose diagram, a small drawing that describes the physics of black holes, and sometimes even more, this concept was made by the recent Nobel prize laureate in physics, Roger Penrose.

Description: Penrose diagram, a small drawing that describes the physics of black holes, and sometimes even more, this concept was made by the recent Nobel prize laureate in physics, Roger Penrose.

Description: Mass-energy equivalence.

Description: Thanks to Albert Einstein, we now have an idea about the Universe that we live in. E equals mc squared, mass–energy equivalence is the principle that anything having mass has an equivalent amount of energy and vice versa.

Description: The Bekenstein Hawking Entropy in Flower Power style.

Description: Penrose diagram, a small drawing that describes the physics of black holes, and sometimes even more, this concept was made by the recent Nobel prize laureate in physics, Roger Penrose.

Description: The Doppler Effect or Doppler shift is the change in frequency of a wave in relation to an observer who is moving relative to the wave source.

Description: The Doppler Effect or Doppler shift is the change in frequency of a wave in relation to an observer who is moving relative to the wave source.