Origami Infinity Star
Armanda Kicks
Thanks again Sara for the beautifully presented and crystal clear instructions. The model is beautiful. My only concern is how to eliminate that hole in the center (you allude to it in the video). Any suggestions?
You can add the crease pattern without collapsing the model into the "waterbomb/preliminary base". This isn't as quick and easy, but does decrease the stress put on the central point considerably.
Or try collapsing the outermost star first and then moving towards the center star. This should put less pressure on the central point, too.
hello, can you please tell me what kind of paper (thickness) is better for the star infinity? I tried two but they were eather too thin or too thick. in general, where can I find this kind of information? thanks a lot!
Learn how to easily make the very cool and popular Origami Ninja Star, also known as the Origami Shuriken! This model is not very complex, but always comes out amazing! To see a video tutorial on how to make this same model, check out my tutorial on youtube at How To Fold an Origami Ninja Star / Shuriken and don't hesitate to check out my channel and other videos on all sorts of origami things!
Start by making a small tear on one end of the crease. Then, use both hands to pull both halves away from each other as shown in the image. You should come out with two perfect rectangles. If this is too difficult for you, you may use scissors to cut along the crease.
Fold the same piece of paper in half width-wise (a.k.a "hamburger style") and unfold. There should be a clear crease running down the center of the paper, which will serve as a reference point for the following step.
Fold one side (in the image it's the right side) of the paper down so that the top edge runs along the center crease. The result should have an almost perfect 90 degree angle. Do the same on the opposite side, but fold it in the opposite direction. After this step, your paper should resemble a bow tie like in the image.
Fold the top corner down so that it forms a peak on top and a point to the side. Then fold the bottom corner up so that it is symmetrical to the top half. DO NOT continue if your paper comes out in a straight line; make sure it looks like the image above.
Notice that the left side of the first half (the red half) is folded up, while the right side is folded down. Fold the new half (yellow) so that the corresponding sides point in opposite directions (left side down, right side up). This is extremely important, the ninja star cannot be completed if they are not opposite.
Fold the corners of the new half down in the same manner as described in step 6. The result should look like the two halves shown above. IMPORTANT: Notice that one of the sides (the first picture) has a slit on the middle, and if you flip them over, the other side does not (the second picture). This is really important for the next step.
The side of the models with the slit should be facing outwards, and the result of this should look like the image above. If they appear in a shape like the spiderman symbol, you did the second piece incorrectly by not folding it in the opposite direction of the first (step eight).
Holding the two halves as instructed in the previous step, take one of the points of the bottom piece and bend it over the top of the piece on top. Then tuck the point into the slit as shown in the pictures above. Do this for the other point as well. The result should appear like the third image.
We use standard size 6 inch x 6 inch (15cm x 15cm) square origami paper for this site unless stated otherwise. If you can, use different types of origami paper to change the look of the finished origami and have fun with it!
From Ken in Salisbury "Origami cubes - 3 origami cubes: The left one is just colorful. I made the middle cube out of post-it notes from my desk while waiting for a client who didn't show. For the right cube, I stuffed the ends into the inside (using tweezers and a needle) to give it solid colors on each face of the cube (skip step 10 - don't flip before you fold in step 11)."
From Jacqueline in Batemans Bay NSW "These are some Origami Boxes I made,
I used Fancy paper for one and with the other I used an Old Tv guide for the 6 pieces. Thanks for the easy Instructions :)
for the newspaper cube I made it without the instructions."
From Karen in Santa Ana " the instructions are pretty easy to follow it just takes a lot of time. i did mine with white piece of paper colored in with markers even though i had construction paper. this was my first origami cube ever and it came out pretty good."
From Kylie in Perth " Here are my first attempts at the origami cube. I used to make these with my friends when I was a girl - now I can teach my children how to make them! Thanks for the great, easy-to-follow instructions!"
From reader " Small origami cube :) my cousin taught me how to make a paper cube on friday night, then the nxt day (saturday night) we also made a small paper cube (a bit bigger than this) but it got squished :o hehe...so here, i made another smaller paper cube :)"
From Zoe in Lynnwood " this origami cube is sooooo cute! This is definently my favorite origami item. Thanks so much for the instructions, your website is actually the only one I understand!!! I made this out of 6 blue 3cm post-it notes."
From Rachel in Happy Valley " This is my origami cube that I made :D It was my second attempt at this. After I saw the challenge, I immediately started on this ^^ As the picture shows, the box is 1.4 cm. Thank you for considering my picture! ^-^"
From Sherry in New Bern " Here are some of cubes, hearts, bows, and one flower I made. I absolutely love this site. The instructions are just so simple and easy to understand! I am working my way through all of them :D"
From Grace in Renton " these are my easy cubes. the two very bottom ones are snobe cubes which are just slightly harder then the easy cubes but very cool when finished. i recommend putting them on your site!"
Origami (or paper folding) is a decorative art form, primarily rooted in ancient Japanese culture. In addition to being a sophisticated and complex art form, origami provides solutions to many problems in modern science and engineering. For example, origami-inspired techniques are used to design stents that fold up very small and then unfold to open clogged arteries, to fold airbags that release effectively during automobile collisions, and even to unfurl the large sunshade for the James Webb Space Telescope (JWST).
An airbag is a ubiquitous piece of equipment in most cars these days. But if you think about how they have to work, airbags have to open very quickly and become sturdy enough to protect the passenger. What's the best way to do that? Create a 3-D polyhedron from a flat sheet with folds.
In this project, we will explore how origami can help us understand how objects can fold up to take up a very small space and unfold to be very large. Using spacecraft design as the main inspiration, we will create mini-solar arrays, a simple folding space telescope, and a mini-sunshade.
These projects are designed to be successful with children and novice folders. No project will be ruined by inaccurate folding. Precision may improve the look of these models, but they will all function well without a high degree of precision. Precision comes with practice.
Every 50 years or so, a massive star in our galaxy blows itself apart in a supernova explosion. Supernovas are one of the most violent events in the universe, and the force of the explosion generates a blinding flash of radiation, as well as shock waves analogous to sonic booms. How does it happen? When the nuclear power source at the center or core of a star is exhausted, the core collapses. In less than a second, a neutron star (or a black hole, if the star is extremely massive) can be formed. The formation of a neutron star releases an enormous amount of energy in the form of neutrinos and heat, which reverses the implosion. All but the central neutron star is blown away at speeds in excess of 50 million kilometers per hour as a thermonuclear shock wave races through the now expanding stellar debris, fusing lighter elements into heavier ones and producing a brilliant visual outburst that can be as intense as the light of several billion Suns.
The intense radiation emitted by a supernova lasts from several months to a few years before fading away. In the meantime, the rapidly expanding (millions of miles per hour) matter from the explosion eventually crashes into circumstellar gas. This collision creates a supernova remnant consisting of hot gas and high-energy particles that glow in radio through X-ray wavelengths for thousands of years.
The process of forming the remnant is somewhat like an extreme version of sonic booms produced by the supersonic motion of an airplane. Expanding stellar debris creates a shock wave that races ahead of the debris. This forward shock wave produces sudden, large changes in pressure and temperature behind the shock wave.
The forward shock wave also accelerates electrons and other charged particles to extremely high energies. Electrons spiraling around the magnetic field behind the shock wave produce radiation over a wide range of wavelengths.
X-rays are produced by the forward shock wave and by a reverse shock wave that heats the debris, or ejecta, of the exploded star. The reverse shock is formed as the high pressure gas behind the forward shock wave expands and pushes back on the stellar ejecta.
A Chandra observation of the supernova remnant Cassiopeia A (Cas A) clearly shows both the outer shock wave and the debris heated by the reverse shock wave. The study of supernova remnants with radio, infrared, optical and X-ray telescopes enables astronomers to trace the progress of the shock waves and distribution of elements ejected in the explosion. These data are especially significant because supernovas are the primary means for seeding the galaxy with many elements such as carbon, nitrogen, oxygen, silicon and iron that are necessary for planets and life.
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