1 00:00:00,000 --> 00:00:06,000 Hey guys, I'm at my cousin's school, the Antonio González Suárez Bilingual School in Oñasco, Puerto Rico. 2 00:00:06,000 --> 00:00:13,000 They're doing an experiment in their teacher, Ms. Alice Acevedo's science class, learning how to measure distances in space. 3 00:00:13,000 --> 00:00:17,000 Cool! Dr. D just told us about the great distances in space. 4 00:00:17,000 --> 00:00:18,000 Can we take a closer look? 5 00:00:18,000 --> 00:00:21,000 Sure, I'd like Kim and I to tell you all about it. 6 00:00:21,000 --> 00:00:26,000 Las puertas decía a mis amigos que están haciendo este experimento. 7 00:00:27,000 --> 00:00:29,000 Hola amigos, mi nombre es Kimberly. 8 00:00:29,000 --> 00:00:32,000 Oh, perdóname. I'm sorry, I'm Kimberly. 9 00:00:32,000 --> 00:00:33,000 And I'm Ida Cortés. 10 00:00:33,000 --> 00:00:45,000 We're here today with our mentors, Brenda Fuentes, Alexis Alicea, Carmen Garcia, and Yadeli Claudio from the Society of Women Engineers. 11 00:00:45,000 --> 00:00:51,000 They are assisting us with a parallax experiment to help us understand how astronomers measure distances in space. 12 00:00:51,000 --> 00:00:55,000 Excuse me, we need to listen to my teacher for a minute. 13 00:00:55,000 --> 00:01:04,000 Hoy estaremos realizando en nuestra clase de ciencia un experimento que es utilizado por los astronautas sobre los equivalentes paralelos en el espacio. 14 00:01:04,000 --> 00:01:07,000 Okay, I'm back. What's parallax? 15 00:01:07,000 --> 00:01:10,000 It's the apparent change in the position of an object. 16 00:01:10,000 --> 00:01:16,000 Try this. Hold your thumb out in front of you and close one eye, then close the other eye. 17 00:01:16,000 --> 00:01:20,000 Looks like my thumb is moving. That's neat. 18 00:01:20,000 --> 00:01:24,000 Even though your thumb really didn't move, it looked like it did. And that's parallax. 19 00:01:24,000 --> 00:01:26,000 So how does the experiment work? 20 00:01:26,000 --> 00:01:32,000 First, we lay out our baseline of rope, 10 meters long. One end is marked A and the other end is B. 21 00:01:32,000 --> 00:01:37,000 Then we place an object not more than 25 meters away from the baseline. 22 00:01:37,000 --> 00:01:41,000 I know this is a protractor, but how is it going to help you measure distance? 23 00:01:41,000 --> 00:01:46,000 You sit on the baseline at point A and make sure that the protractor is parallel with the rope. 24 00:01:46,000 --> 00:01:48,000 Why did you put the pencil on the vertex? 25 00:01:48,000 --> 00:01:52,000 Putting it there helps you line the object up as you look at it. 26 00:01:52,000 --> 00:01:54,000 What comes next? 27 00:01:54,000 --> 00:02:00,000 Now move another pencil around the outer edge of the protractor until it lines up with the object. 28 00:02:00,000 --> 00:02:02,000 How do you read the protractor? 29 00:02:02,000 --> 00:02:06,000 Your partner will actually read it for you and record the angle. 30 00:02:06,000 --> 00:02:09,000 Next, we move to the other end and repeat the steps. 31 00:02:09,000 --> 00:02:15,000 Notice how the flagpole seems to have changed its position and appears as a different angle. 32 00:02:15,000 --> 00:02:17,000 Now what do you do with your data? 33 00:02:17,000 --> 00:02:24,000 Plot it on graph paper. Draw a 10 centimeter baseline at the bottom of the paper and then draw in our angles. 34 00:02:24,000 --> 00:02:27,000 Do the two lines intersecting mean anything? 35 00:02:27,000 --> 00:02:31,000 Yes, it is telling us the distance that the object is from the baseline. 36 00:02:31,000 --> 00:02:33,000 How do you determine the distance? 37 00:02:33,000 --> 00:02:38,000 Draw a perpendicular line from the point of intersection to the baseline and then measure it. 38 00:02:38,000 --> 00:02:40,000 What's the scale? 39 00:02:40,000 --> 00:02:45,000 We use the scale that means 1 centimeter on the graph paper equals 1 meter outside. 40 00:02:45,000 --> 00:02:51,000 I get it. So if the line measures 15 centimeters, the distance from the object is 15 meters. 41 00:02:51,000 --> 00:02:57,000 Astronomers are able to see on a parashift the nearby stars as the Earth revolves around the Sun. 42 00:02:57,000 --> 00:02:59,000 That's really interesting. 43 00:02:59,000 --> 00:03:03,000 And thanks to the Society of Women Engineers for providing us with mentors. 44 00:03:03,000 --> 00:03:08,000 Visit the NASA Sci-Fi's website to learn how to get your own classroom mentors. 45 00:03:08,000 --> 00:03:11,000 Thanks, Kim and Ida. I've got to go to my next meeting. 46 00:03:11,000 --> 00:03:12,000 ¿Qué hora es? 47 00:03:12,000 --> 00:03:14,000 It's 3 p.m. 48 00:03:14,000 --> 00:03:16,000 I'd better run. Adios, amigas. 49 00:03:16,000 --> 00:03:17,000 Adios.