HS-ESS1-2
Construct an explanation of the Big Bang theory based on astronomical evidence of light spectra, motion of distant galaxies, and composition of matter in the universe.
- Space
Scientists Say: Supernova
When a star has too much mass, it can explode. The explosion is called a supernova.
- Physics
Eclipses come in many forms
Eclipses are one of nature’s most awesome spectacles, and scientists have learned a lot by observing them and related celestial alignments — occultations and transits.
- Space
Cosmic mystery: Why are many galaxies dark?
Dark galaxies went unnoticed until 2015. Since then, scientists have now found more than 1,000 — and there may be many, many more.
- Planets
How Earth got its moon
How did our moon form? Scientists are still debating the answer. It may be the result of some one big impact with Earth — or perhaps many small ones.
- Planets
Analyze This: The masses of planets
Scientists discovered a solar system with planets that are similar in size and mass to Earth. Using data, we take a closer look at that similarity.
- Planets
Scientists Say: Dwarf planet
Dwarf planets are distinct from the full-size models. A little too small, they also have a lot of space stuff filling their path around the sun.
- Animals
Cool Jobs: A world aglow
Three scientists probe how the natural world makes light, in hopes of using this information to design new and better products.
- Physics
Star caught passing gas before exploding
Stars can become unstable as they near death, a new study suggests. Some may even spew gas for a year or so before they explode.
- Physics
Scientists Say: Dark matter
Most of the universe isn’t made of stuff we can see. Scientists think some of it might be made of dark matter — matter that emits no radiation.
- Planets
New solar system found to have 7 Earth-size planets
A neighboring star system hosts seven Earth-like planets. Especially surprising: Three of those planets appear to reside in a zone that could support life as we know it.
- Physics
Strange X-rays point to possible ‘dark’ matter
Scientists have been looking for “dark” matter. It’s supposed to make up most of the universe — but it’s also invisible. X-rays may now point to where some of this weird stuff is.
- Space
Cool Jobs: Probing Pluto
The New Horizons mission captivated the world as it flew by Pluto. Here are some of the people who made that possible.
