---
title: "List of common misconceptions about science, technology, and mathematics"
chunk: 1/16
source: "https://en.wikipedia.org/wiki/List_of_common_misconceptions_about_science,_technology,_and_mathematics"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T03:28:18.528573+00:00"
instance: "kb-cron"
---

Each entry on this list of common misconceptions is worded as a correction; the misconceptions themselves are implied rather than stated. These entries are concise summaries; the main subject articles can be consulted for more detail.

== Astronomy and spaceflight ==
There is no scientific evidence that the motion of stars, planets, and other celestial bodies influences the fates of humans, and astrology has repeatedly been shown to have no explanatory power in predicting future events.
Astronauts in orbit have the sensation of being weightless because they are in free fall around the Earth, not because they are so far away from the Earth that its gravitational pull is negligible. For example, on the International Space Station the Earth's gravity is nearly 90% as strong as at the surface. Objects orbiting in space would not remain in orbit if not for the gravitational force, and gravitational fields extend even into the depths of intergalactic space.
 The dark side of the Moon receives about the same amount of light from the Sun as the near side. The far side is called "dark" not because it never receives light but because it had never been seen until humans sent spacecraft around the Moon, since the same side of the Moon always faces the Earth due to tidal locking.
Black holes have the same gravitational effects as any other equal mass in their place. They will draw objects nearby towards them, just as any other celestial body does, except at very close distances to the black hole, comparable to its Schwarzschild radius. If, for example, the Sun were replaced by a black hole of equal mass, the orbits of the planets would be essentially unaffected.
 Seasons are not caused by Earth being closer to the Sun in the summer than in the winter, but by the effects of Earth's 23.4-degree axial tilt. Each hemisphere is tilted towards the Sun in its respective summer, resulting in longer days and more direct sunlight, with the opposite being true in the winter. Earth reaches the point in its orbit closest to the Sun in January, and it reaches the point farthest from the Sun in July, so the slight contribution of orbital eccentricity opposes the temperature trends of the seasons in the Northern Hemisphere.
When a meteor or spacecraft enters the atmosphere, the heat of entry is not primarily caused by friction, but by adiabatic compression of air in front of the object.
Egg balancing is possible on every day of the year, not just the vernal equinox.
The Fisher Space Pen was not commissioned by NASA at a cost of millions of dollars, while the Soviets used pencils. Pencils posed a major risk to astronauts due to the release of substances such as shavings and pencil lead being a flight hazard. The pen was independently developed by Paul C. Fisher, founder of the Fisher Pen Company, with $1 million of his own funds (equivalent to $10 million in 2025). NASA tested and approved the pen for space use, then purchased 400 pens at $6 per pen (equivalent to $58 in 2025). The Soviet Union subsequently also purchased the Space Pen for its Soyuz spaceflights.
Tang, Velcro, and Teflon were not spun off from technology originally developed by NASA for spaceflight, though many other products (such as memory foam and space blankets) were.
The Sun is not yellow; rather, it emits light across the full spectrum of visible colors, and this combined light appears white when outside of Earth's atmosphere. Earth's atmosphere scatters shorter wavelengths of light, particularly blues and violets, more than longer wavelengths like reds and yellows, and this scattering is why the Sun appears yellow during the day or orange or red during sunrise and sunset. The scattered blue/violet light, appearing to come from all directions, is what makes the rest of the sky look blue.
 The Great Wall of China is not the only human-made object visible from space or from the Moon. None of the Apollo astronauts reported seeing any specific human-made object from the Moon, and even Earth-orbiting astronauts can see it only with magnification. City lights, however, are easily visible on the night side of Earth from orbit.
The Big Bang model does not fully explain the origin of the universe. It does not describe how energy, time, and space were caused, but rather it describes the emergence of the present universe from an ultra-dense and high-temperature initial state.

== Biology ==