We hope you enjoy our Henrietta Leavitt Short-Sleeve Black T-Shirt. Henrietta Swan Leavitt was an awesome American astronomer who lived from 1868 to 1921. Her work revealing the period-luminosity relationship for Cepheid variables allowed astronomers to measure distances up to a range of 20 million light years away from Earth. This was the first time that astronomers were able to develop a clear picture of the size of our own galaxy, the Milky Way, with a diameter of approximately 100,000 light years. Henrietta Swan’s work was also necessary for Edwin Hubble to determine that our universe is expanding. On the sleeve is a graph from a 1912 publication by Henrietta Leavitt and Edward C. Pickering demonstrating various stars’ minimum and maximum brightness (the horizontal axis is the logarithm of the period of the researched Cepheid variable stars, and the vertical axis is the corresponding magnitude). This design is made of 100% ring-spun cotton and is soft and comfy. The double stitching on the neckline and sleeves add more durability to what is sure to be a favorite!
• 100% ring-spun cotton
• 4.5 oz/yd² (153 g/m²)
• Unisex fit
• Shoulder-to-shoulder taping
• Quarter-turned to avoid crease down the center
• Blank product sourced from our friends in Bangladesh, Honduras, Haiti, Mexico, or Nicaragua