We would be amazed if we could look up at the night sky and see all the rocks flying through space around us. Our Solar System contains billions of them, all orbiting the Sun-like miniature worlds. Occasionally, Earth crosses paths with one of these meteoroids and it burns up in our atmosphere as a meteor or shooting star. But some survive their fiery passage and land on the ground as a charred rock. Most of these are never found, but a few are seen to fall and then are recovered to be studied by scientists. All these meteorites are fascinating, but some are more valued by scientists and collectors. One might even say they are 'celebrity meteorites'. Here, we look at five of these most famous space rocks.
The Winchcombe meteorite
Late on the evening of 28 February 2021, thousands of people across the UK and northern Europe saw a bright fireball streaking across the sky, and some of them heard sonic booms. The fireball was also recorded by the cameras of the UK Fireball Alliance (www.ukfall.org.uk), a network of cameras scattered across the UK. By combining the eyewitness reports and analysing the survey images, experts calculated that meteorites may have landed in, or near, the Gloucestershire village of Winchcombe. The next day a hunt began, and before too long dark, fragile rocks were spotted in the grass. One family found a pile of the rocks on their driveway, surrounded by black powder - yet more pieces of what would become known as the 'Winchcombe meteorite'. A rare, carbonaceous chondrite-type rock, it was the first meteorite to be recovered in the UK in 30 years.
The Chelyabinsk meteorite
この記事は BBC Sky at Night Magazine の July 2022 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です ? サインイン
この記事は BBC Sky at Night Magazine の July 2022 版に掲載されています。
7 日間の Magzter GOLD 無料トライアルを開始して、何千もの厳選されたプレミアム ストーリー、9,000 以上の雑誌や新聞にアクセスしてください。
すでに購読者です? サインイン
Could We Find Aliens by Looking for Their Solar Panels?- Designed to reflect ultraviolet and infrared, the panels have a unique fingerprint
Researchers searching for life beyond Earth spend a lot of time thinking about what telltale signs might be detectable astronomically. Forms of unambiguous evidence for the presence of life on another world are known as biosignatures. By extension, techno signatures are indicators of activity by intelligent, civilisation-building life.
Antimatter- In our continuing series, Govert Schilling looks at antimatter, the strange counterpart to most of the matter filling our Universe
Particles and corresponding antiparticles are very much alike, except they have opposite electrical charges. For instance, the antiparticle of the electron - known as the positron - has the same tiny mass, but while electrons carry a negative electrical charge, positrons are positively charged.
Where Have All The Milky Way's Early Stars Gone?- Our Galaxy has a curious lack of pristine stars
The Big Bang produced a Universe filled almost exclusively with hydrogen and helium; all other elements - what astronomers call metals - were produced by stars, supernovae and everything that happens later. So if you can pick out a pristine star with no metals polluting it from among the billions in the Milky Way, then you are likely to have a star dating from our Galaxy's earliest days.
Inside The Sky At Night - Two years ago, exoplanet scientist Hannah Wakeford received some of the first data from the JWST
Two years ago, exoplanet scientist Hannah Wakeford received some of the first data from the JWST. In July's Sky at Night, we discovered what she's learned since then.
How to stack DSLR data in Siril
Easily combine multiple frames to boost detailin your astro photos
Lunar occultation of Saturn
You'll need to strike a balance on 21 August to capture the Moon covering the ringed planet
How to plot a variable star light curve
A rewarding project to chart stars that change brightness
Smartphone photography with a telescope
Mary Mcintyre explains how to get impressive night-sky images using your phone
Once-a-century solar storm is overdue
If a Carrington Event struck today it would be catastrophic, says Minna Palmroth
The new era of human spaceflight
There's been a step-change in crewed space missions since the dawn of the 21st century. Ben Evans charts its course and looks ahead to future horizons