I was having my morning coffee after starting my working today when i listened to a helicopter passing by around 50 m high over our university (universidade do vale do itajaã). after spotting the helicopter, i noticed something like a helium balloon around 100 m above the helicopter. first i thought it was too big for a balloon after it appeared like a parachute so i thought it was part of a weather balloon. suddenly it moved and i saw it had a white color and looked like a zeppelin or a plane without wings. no sound!!!! the sky was totally blue without any clouds! when i looked sideways searching for another witness it made a curve heading to the shoe and in an eye blink, it accelerated and disappeared. i pointed my smartphone to it but i could only get the helicopter in the frame, i could look at it but it didn't show up in the phone!!! very strange and unusual, it made me think why people are confused about reporting a ufo since it could be described as tic-tac, cigar-shaped, zeppelin, missile, a plane without wings but no one of these can really describe what i saw. i always thought i would see something glowing in the night sky or a metallic disc in the air. today helicopter traffic over the city has been also unusual, after the event i saw 4 helicopters passing by, 1 was grey from the navy! dr. rick schwarz