Mason Blake
The concept of sound in space has long been a subject of fascination. While space is a vacuum devoid of matter, some sounds can be detected from extremely low-density matter in deep space. Sounds in space are not audible to the human ear, but with the help of technology, they can be converted into audible frequencies. For instance, NASA's Perseverance rover recorded sounds of Martian winds and snapping rocks, and artists have even created music using frequencies from space. Additionally, scientists have studied the sounds of celestial bodies like stars, black holes, and nebulae, using sonification to represent astronomical data as sound. These sounds provide valuable insights into the nature of the universe and have sparked curiosity about the songs of the cosmos.
| Characteristics | Values |
|---|---|
| Do heavenly bodies produce sound? | No, sound cannot travel in space as it is a vacuum almost void of matter. |
| How do we hear sounds from heavenly bodies? | Sound is a wave that is carried by atoms and molecules. In space, these waves are carried by extremely low-density matter. These waves are then converted into audible sounds. |
| What do heavenly bodies sound like? | Sounds vary depending on the size of the star. Large stars can sound like a warped ray gun, while medium-sized stars can sound like a persistent hum. Small stars can sound like a weather siren. |
| What are some examples of sounds from heavenly bodies? | - The song of the sun |
- Cassini-Huygens passing through Saturn's rings
- Martian winds
- Lightning
- Oceans
- Tectonic plates |
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What You'll Learn
Sounds in space
The concept of sound in space is intriguing, and while space is a vacuum devoid of matter, some sounds can be detected from extremely low-density matter in deep space. Sounds in space can be understood through various examples, such as the "Singing Comet", Martian winds, and the conversion of astronomical data into audible sounds through sonification.
Firstly, the "Singing Comet" was one of the first pure audio clips to go viral on SoundCloud. It captured the sounds of dust impacts from a comet, providing a unique perspective on the sounds of space. Radio astronomy is another promising source of space sounds, as radio telescopes can transform data into audible formats.
Secondly, in 2022, NASA's Perseverance rover allowed people on Earth to hear the sounds of Mars. The audio clips included Martian winds and the snapping of the rover's laser hitting rocks. These sounds contribute to our understanding of the planet and provide a unique perspective on our neighbouring world.
Additionally, the process of sonification involves converting astronomical data into audible sounds. NASA's Hubble telescope, for example, enables users to create symphonies based on visual data. The vertical position of objects in an image is mapped to pitch, with brightness controlling volume. This process allows for a unique interpretation of visual data through sound.
Furthermore, the study of "The Photometric Variability of Massive Stars Due to Gravity Waves Excited by Core Convection" explored how stars change the sound of music and how these waves would appear as twinkling on the star's surface. Researchers increased the frequencies of the waves generated by convection to make them audible, resulting in sounds like a warped ray gun or a persistent hum, depending on the size of the star.
In conclusion, while space may be a vacuum, sounds in space can be detected and provide valuable insights into our universe. Through various methods such as sonification, sensitive microphones, and data analysis, we can explore and understand the unique sounds of space, contributing to both scientific research and our artistic interpretations of the cosmos.
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Sonification
Sound plays a crucial role in understanding the cosmos, enhancing our perception of the universe. Sonification is the process of converting data, including research data, into digital audio files, enabling us to hear and interpret information. This technique has been applied to data from various telescopes and spacecraft, allowing us to "hear" the cosmos and gain new insights.
NASA, for example, has utilized sonification to explore Messier 87 (M87), a black hole that gained fame through the Event Horizon Telescope (EHT) project in 2019. The sonification of M87 incorporates data from telescopes observing X-rays, visible light, and radio waves, providing a multisensory experience of this celestial phenomenon. Additionally, NASA's Hubble Space Telescope has contributed to sonification projects, allowing people to hear the music of the spheres and experience astronomical wonders through sound.
The process of sonification involves assigning pitches and volumes to different elements within the data. For instance, brightness and position influence pitch and volume, with brighter objects often producing louder sounds. The vertical position of objects in an image can also impact pitch, with higher positions corresponding to higher pitches. This approach enables the translation of astronomical images into audible representations, making them accessible to a wider audience, including the visually impaired.
The artistic and scientific fusion of sonification also extends to music. Musician Mickey Hart, for instance, created music using frequencies from space, showcasing how sonification can inspire artistic expression. Additionally, the "Singing Comet" on SoundCloud, featuring sounds of dust impacts from a comet recorded by the Stardust probe, has garnered over 5 million listens, captivating audiences with the otherworldly sounds of space.
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The 'singing comet'
The concept of sounds in space has always been intriguing, with scientists and musicians alike trying to decipher the sounds of heavenly bodies. While space is a vacuum, meaning there are almost no matter and no atoms or molecules to carry sound waves, sounds can be detected from extremely low-density matter in deep space.
The Singing Comet
The "Singing Comet" was one of the first pure audio clips to go viral, being heard over 5 million times. It was an artist's impression of the Stardust probe, which recorded the sounds of dust impacts from a comet. This was an example of "sonification", where non-acoustic data is turned into audible sound. The process involves scaling the data to audible frequencies and then converting it into a sound wave.
The "Singing Comet" was an example of how sounds from space can be converted into music that can be heard by the human ear. The process involves using sensitive microphones to capture the sounds, which are then processed and converted into audible frequencies. The result is a unique and otherworldly sound that offers a new way to explore and understand the universe.
The "Singing Comet" and other sonifications of space data have opened up new possibilities for both scientific research and artistic expression. By listening to the sounds of space, scientists can gain new insights and a deeper understanding of the cosmos. For musicians, the sounds of space provide a vast source of inspiration and a way to create music that is truly out of this world.
The "Singing Comet" has sparked further exploration and experimentation with the sounds of space, with musicians and scientists continuing to collaborate and innovate in the field of acoustic astronomy.
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Stars and their sounds
Space is a vacuum, which means it is almost devoid of matter. Sound travels through the vibration of atoms and molecules, and in the vacuum of space, there are no atoms or molecules to carry a sound wave, so technically there is no sound. However, scientists have found ways to listen to the sounds of heavenly bodies, including stars.
Sound waves can be detected from extremely low-density matter in deep space. Using sensitive microphones, scientists can detect sounds from other planets in our solar system, such as the gust of Martian wind or the snapping sound of a rover's laser hitting a rock.
A process called sonification is used to turn non-acoustic data into audible sounds. This involves converting astronomical data into sound waves. For example, the brightness of light sources can be converted into volume, with brighter lights producing louder sounds. The pitch of the notes can be adjusted to indicate the vertical position of the sources in the image, with higher pitches representing objects located towards the top of the image.
NASA has used sonification to create sounds from stars and other celestial objects. In one example, a cluster of young stars located about 20,000 light-years from Earth was sonified using data from the Hubble and Chandra telescopes. The Hubble data was played using strings, with individual stars plucked and diffuse clouds bowed. The Chandra X-ray data was represented by bells, with more sustained tones for diffuse X-ray light.
Another example of sonification is the "Singing Comet", an audio clip of sounds from a comet that went viral on SoundCloud. Additionally, musician Mickey Hart created music using frequencies from space, and Fiorella Terenzi, a pioneer of "acoustic astronomy", transformed telescope data into audible sounds.
In a study published in Nature Astronomy, researchers led by Evan Anders from Northwestern University used computer models to determine how the twinkling of stars would sound. They found that the size and brightness of a star correspond to different sounds. For example, a large star produces sounds like a warped ray gun, while a medium-sized star creates a persistent hum, and a small star emits a plaintive alert similar to a weather siren.
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Sound in a vacuum
The idea that sound cannot travel through a vacuum is a common misconception. The tagline of the 1979 sci-fi film "Alien" famously stated that "in space no one can hear you scream". This is because, in a vacuum, there is no medium for sound waves to travel through and vibrate.
However, recent studies have shown that sound can, in fact, be transmitted through a vacuum. In 2023, researchers from the University of Jyväskylä in Finland demonstrated that sound waves can be transmitted through a vacuum gap between two solids if the materials in question are piezoelectric. In the experiment, sound waves were transmitted, or "tunneled", across a vacuum between two zinc oxide crystals by transforming the vibrating waves into ripples within an electric field between the objects.
Zinc oxide crystals are piezoelectric, meaning that when force or heat is applied to them, they produce an electrical charge. Therefore, when sound is applied to one of these crystals, it creates an electrical charge that disrupts nearby electric fields. If the crystal shares an electric field with another crystal, the magnetic disruption can travel from one to the other across a vacuum. The disruptions mirror the frequency of the sound waves, so the receiving crystal can interpret the disruption and turn it back into sound on the other side of the vacuum.
This effect works in the audio range of frequencies (Hz–kHz), as well as in ultrasound (MHz) and hypersound (GHz) frequencies, as long as the vacuum gap is made smaller as the frequencies increase. While the effect is small in most cases, researchers also found situations where the full energy of the wave jumped across the vacuum with 100% efficiency, without any reflections.
Despite these findings, the rule-breaking trick requires specific circumstances and can only be carried out over extremely small distances. Therefore, it is safe to say that, for now, the idea of screaming into the void remains purely metaphorical.
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Frequently asked questions
Yes, heavenly bodies do produce sound, but it is not audible to humans without specialised equipment. Sound is carried by atoms and molecules, and in space, there are no molecules to carry sound waves. However, with sensitive microphones, we can hear sounds from other planets, such as Martian winds and Saturn's aurora.
The process of turning non-acoustic data into audible sounds is called sonification. Scientists use telescopes to capture data, which can then be transformed into audible sounds.
Depending on the size of the star, the sounds they make vary. Large stars can sound like a warped ray gun, while medium-sized stars produce a persistent hum. Smaller stars sound like a weather siren.
In 2022, people on Earth were able to hear the sounds of Mars through microphones installed on NASA's Perseverance rover.
The "Singing Comet" was one of the first pure audio clips to go viral on SoundCloud. It was an artist's impression of the Stardust probe, which recorded sounds of dust impacts from a comet.
