(PhysOrg.com) -- When a meteor impacts a planet or a moon, it always stops at a relatively shallow depth, even when impacting at high speeds. Until now, researchers have assumed that all objects impacting a granular medium ...
A mirror on the James Webb Space Telescope was struck by a micrometeoroid last month but is expected to continue to function normally, NASA said Thursday.
Space Exploration
Jun 9, 2022
39
1185
Using data from NASA's Transiting Exoplanet Survey Satellite (TESS), astronomers at the University of Maryland (UMD), in College Park, Maryland, have captured a clear start-to-finish image sequence of an explosive emission ...
Astronomy
Dec 3, 2019
5
384
As our solar system was forming nearly four and a half billion years ago, a planet-sized object struck the early Earth, leading to the formation of the moon, possibly from a hot, spinning cloud of rock vapor called a synestia. ...
Space Exploration
Jul 10, 2019
1
265
(Phys.org)—Discovered in 1983, the near-Earth asteroid Phaethon is an intriguing object, primarily due to its unusual orbit. Recently, an international team of astronomers has conducted a detailed study of this unique space ...
Conditions in the vast universe can be quite extreme: Violent collisions scar the surfaces of planets. Nuclear reactions in bright stars generate tremendous amounts of energy. Gigantic explosions catapult matter far out into ...
General Physics
Apr 15, 2016
35
2542
The meteor that exploded over Chelyabinsk, Russia in February 2013 was "a wake-up call," according to a University of California, Davis scientist who participated in analyzing the event. The work is published November 7, ...
Space Exploration
Nov 6, 2013
0
0
(Phys.org) —A team of researchers with members from Colorado State University, the University of Wisconsin and NOAA has found that several satellites orbiting the Earth at the time of the Chelyabinsk meteor explosion captured ...
The "super-eruption" of a major volcanic system occurs about every 100,000 years and is considered one of the most catastrophic natural events on Earth, yet scientists have long been unsure about what triggers these violent ...
Earth Sciences
Oct 12, 2011
20
3
(PhysOrg.com) -- An Australian scientist studying photographs of fireballs, UFO sightings and a report of a strange green light in the sky suggests some UFOs may be ball lightning caused by fireball meteors.
A meteoroid is a sand- to boulder-sized particle of debris in the Solar System. The visible path of a meteoroid that enters Earth's (or another body's) atmosphere is called a meteor, or colloquially a shooting star or falling star. If a meteoroid reaches the ground and survives impact, then it is called a meteorite. Many meteors appearing seconds or minutes apart are called a meteor shower. The root word meteor comes from the Greek meteo¯ros, meaning "high in the air". The Minor Planet Center does not use the term "meteoroid".
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