The Astronomy Book

COSMIC EXPANSION IS ACCELERATING DARK ENERGY ...

300 DARK ENERGY T he Big Bang theory has at its heart a simple idea— the universe started out very small and then expanded. In 1 ...

301 the large-scale structure of the universe have since revealed that billions of galaxies are clustered together around vast e ...

302 and so its apparent magnitude (brightness as seen from Earth) shows how far away it is. A type 1a supernova is a little diff ...

303 public with their findings. The results shook the scientific world. Using Einstein’s field equations for general relativity, ...

304 PEERING BACK OVER 13.5 BILLION YEARS STUDYING DISTANT STARS IN CONTEXT KEY DEVELOPMENT James Webb Space Telescope (2002–) BE ...

305 See also: Radio astronomy 179 ■ Space telescopes 188–95 ■ A digital view of the skies 296 ■ Gravitational waves 328–31 ■ Lag ...

OUR MISSION IS TO LAND ON A COMET UNDERSTANDING COMETS ...

OUR MISSION IS TO LAND ON A COMET UNDERSTANDING COMETS ...

308 B y studying comets, astronomers hope to shed new light on various questions about the early solar system, the formation of ...

309 creates streams of dust, gas, and plasma hundreds of millions of miles long. The material in the tail is lost from the comet ...

310 In the early 19th century, it allowed scholars to decipher the hieroglyphic writing system, thus unlocking the meaning of ma ...

311 thought that the lander landed awkwardly and hit a boulder, and the very low gravity of the comet meant Philae bounced right ...

312 THE VIOLENT IRTH OF THE B SOLAR SYSTEM THE NICE MODEL IN CONTEXT KEY ASTRONOMERS Rodney Gomes (1954 –) Hal Levison (1959 –) ...

313 See also: The discovery of Ceres 94–99 ■ The Kuiper belt 184 ■ The Oort cloud 206 ■ Investigating craters 212 ■ Exploring be ...

314 A CLOSE-UP VIEW OF AN ODDBALL OF THE SOLAR SYSTEM TUDYING PLUTOS I n January 2006, NASA’s New Horizons spacecraft lifted off ...

315 See also: The Oort cloud 206 ■ The composition of comets 207 ■ Exploring the solar system 260–67 ■ Exploring beyond Neptune ...

316 of space exploration—30 AU, or 2.7 billion miles (4.4 billion km) from Earth. To achieve this, the spacecraft was given the ...

317 it was estimated that Pluto was seven times the size of Earth. By 1978, it was clear that Pluto was smaller than Earth’s Moo ...

A LABORATORY ON MARS EXPLORING MARS ...