How the Earth got its core – Science News, July 1, 1972 In the beginning, scientists believe there was an interstellar gas cloud of all the elements comprising the Earth.…
Category: Space
New Gaia data paint the most detailed picture yet of the Milky Way
1.6 billion stars. 11.4 million galaxies. 158,000 asteroids. One spacecraft. The European Space Agency’s Gaia space observatory, which launched in 2013, has long surpassed its goal of charting more than…
Aliens could send quantum messages to Earth, calculations suggest
An intelligent alien civilization could beam quantum messages to Earth. Particles of light, or photons, could be transmitted over vast, interstellar distances without losing their quantum nature, researchers report June…
An otherwise quiet galaxy in the early universe is spewing star stuff
PASADENA, Calif. — A lucky celestial alignment has given astronomers a rare look at a galaxy in the early universe that is seeding its surroundings with the elements needed to…
Gravitational wave ‘radar’ could help map the invisible universe
It sounds like the setup for a joke: If radio waves give you radar and sound gives you sonar, what do gravitational waves get you? The answer might be “GRADAR”…
Seven newfound dwarf galaxies sit on just one side of a larger galaxy
PASADENA, Calif. — The faint dwarf galaxies in a nearby galaxy group seem to have missed the memo. Instead of being dispersed evenly around the group’s most massive galaxy, which…
Neutrinos hint the sun has more carbon and nitrogen than previously thought
After two decades of debate, scientists are getting closer to figuring out exactly what the sun — and thus the whole universe — is made of. The sun is mostly…
New Gaia data paint the most detailed picture yet of the Milky Way
1.6 billion stars. 11.4 million galaxies. 158,000 asteroids. One spacecraft. The European Space Agency’s Gaia space observatory, which launched in 2013, has long surpassed its goal of charting more than…
A celestial loner might be the first known rogue black hole
A solitary celestial object — more massive than the sun, yet far smaller — is wandering the galaxy a few thousand light-years from Earth. It might be the first isolated…
Information energy accounts for dark energy, resolves Hubble tension, avoids the ‘big chill,’ and is falsifiable
Stellar heated gas and dust in the Centaurus-A galaxy. Credit: NASA Hubble. Stellar heated gas and dust has an entropy, or information content, with an equivalent energy of 1070 joules,…
