England · Pearson EdexcelQ&A
AstronomyQ&A by dot point
A short Q&A bank for every England Astronomy syllabus dot point. Each question and answer is drawn directly from our worked dot-point page, so you can scan key concepts before opening the long-form answer.
Topic 6: Celestial observation
- The diurnal motion of the sky, circumpolar stars and how to tell whether a star is circumpolar, upper and lower transit (culmination), and finding latitude from Polaris.2Q&A pairs
- Recognising naked-eye phenomena and constellations, using asterisms as pointers, the effects of light pollution, naked-eye observing techniques, and the appearance of the Milky Way.2Q&A pairs
- The celestial sphere, poles and equator, the equatorial coordinate system (right ascension and declination), the horizon coordinate system (altitude and azimuth), and hour angle and local sidereal time.2Q&A pairs
Topic 16: Cosmology
- Redshift of distant galaxies and its cause, the redshift formula, Hubble's law relating distance and recession velocity, and estimating the age and size of the Universe.2Q&A pairs
- The evidence for the expanding Universe and the Big Bang (quasars, the CMB, the Hubble Deep Field), the significance of CMB fluctuations, and dark matter, dark energy and the future of the Universe.2Q&A pairs
Topic 7: Early models of the Solar System
- How ancient civilisations used solar and lunar cycles and aligned monuments, why those alignments have shifted, and the early geocentric model with Ptolemy's epicycles.2Q&A pairs
- The scale of the Solar System and the astronomical distance units: the astronomical unit (AU), the light year (l.y.) and the parsec (pc).2Q&A pairs
Topic 13: Exploring starlight
- Arcminutes and arcseconds, the parsec, heliocentric parallax for measuring distances, and using Cepheid variables and other variable stars and their light curves.2Q&A pairs
- The information in a stellar spectrum, classifying stars by spectral type and colour, and sketching and reading the Hertzsprung-Russell diagram.2Q&A pairs
- The astronomical magnitude scale, apparent and absolute magnitude, the distance modulus formula, and the inverse square relationship between distance and brightness.2Q&A pairs
Topic 9: Exploring the Moon
Topic 11: Exploring the Solar System
- The bodies of the Solar System (planets, dwarf planets and small bodies), the structure and orbits of comets, the Kuiper Belt and Oort Cloud, and the characteristics of the planets.2Q&A pairs
- The advantages and disadvantages of fly-by, orbiter, impactor and lander probes with examples, escape velocity, manned missions and the Apollo programme, and transits of Venus.2Q&A pairs
Topic 12: Formation of planetary systems
- The roles of gravitational and tidal forces in the Solar System, the interactions that form planets and moons including the Roche Limit, and the theories for the formation of gas giants.2Q&A pairs
- Methods of discovering exoplanets, the requirements for life and the Goldilocks Zone, the Drake equation for estimating civilisations, and the search for extra-terrestrial intelligence (SETI).2Q&A pairs
Topic 15: Our place in the Galaxy
- The Hubble classification of galaxies and the Tuning Fork diagram, active galactic nuclei and the types of active galaxy, and why galaxies form clusters and superclusters.2Q&A pairs
- The appearance, size, shape and contents of the Milky Way, the use of 21 cm radio waves to map it, and the composition and scale of the Local Group of galaxies.2Q&A pairs
Topic 1: Planet Earth
- Latitude and longitude, the major surface reference points (equator, tropics, polar circles, Prime Meridian and poles), and the effects of the atmosphere on astronomical observations.2Q&A pairs
- The shape, size and internal structure of the Earth: the oblate spheroid, the mean diameter of 13000 km, and the crust, mantle, outer core and inner core.2Q&A pairs
Topic 8: Planetary motion and gravity
- Kepler's three laws of planetary motion, the use of Kepler's third law in the form T squared over r cubed equals a constant, and Newton's law of universal gravitation.2Q&A pairs
- The contributions of Brahe's observations and the mathematical modelling of Copernicus and Kepler in the transition from a geocentric to a heliocentric model, and the role of gravity in stable elliptical orbits.2Q&A pairs
Topic 10: Solar astronomy
- The structure, origin and evolution of sunspots, using sunspot data to find the solar rotation period and the solar cycle, the solar wind and its effects, and the Earth's magnetosphere.2Q&A pairs
- Safe solar observation, the Sun's internal divisions and their role in energy production and transfer, the proton-proton fusion chain, and the structure of the solar atmosphere.2Q&A pairs
Topic 5: Solar System observation
- The appearance and cause of meteors and meteor showers, the determination of the radiant, and the changing positions of the planets within the Zodiacal Band.2Q&A pairs
- Safe solar observation by pinhole projection, the ecliptic and Zodiacal Band, retrograde motion of the planets, and the configuration terms conjunction, opposition, elongation, transit and occultation.2Q&A pairs
Topic 14: Stellar evolution
- The life cycle of a high-mass star, the neutron pressure that supports a neutron star, the Chandrasekhar Limit, and how astronomers find evidence for black holes.2Q&A pairs
- The radiation pressure versus gravity balance in a main sequence star, the changes through the life cycle of a low-mass star, and the electron pressure that supports a white dwarf.2Q&A pairs
Topic 11: Telescopes and observatories
- The light grasp and aperture of a telescope, the magnification formula using the focal lengths of objective and eyepiece, the field of view, and the resolution of a telescope.2Q&A pairs
- How a telescope's objective collects and focuses light for an eyepiece to magnify, the use of converging lenses and concave mirrors, and the main refracting and reflecting telescope designs.2Q&A pairs
- Astronomy across the electromagnetic spectrum, the optical and radio atmospheric windows, why the atmosphere harms observations, and the advantages and disadvantages of space telescopes.2Q&A pairs
Topic 3: The Earth-Moon-Sun system
- The causes and appearance of solar eclipses (partial, total, annular) and lunar eclipses (partial, total), including the terms first, second, third and fourth umbral contact.2Q&A pairs
- The relative sizes and distances of the Earth, Moon and Sun, the Sun's mean diameter, and how Eratosthenes and Aristarchus determined the sizes and distances from observations.2Q&A pairs
- The relative effects of the Sun and Moon in producing spring and neap tides, and the precession of the Earth's axis, its effects on the sky and its use in archaeoastronomy.2Q&A pairs
Topic 2: The lunar disc
- The shape and size of the Moon, the principal naked-eye surface formations (craters, maria, terrae, mountains, valleys), their origin, and the named features on the lunar disc.2Q&A pairs
- The rotation and revolution periods of the Moon, the synchronous nature of its orbit, and the causes and effects of lunar libration.2Q&A pairs
Topic 4: Time and the Earth-Moon-Sun cycles
- Apparent and mean solar time, the Equation of Time and its annual variation, and the use of shadows, shadow sticks and sundials to find local noon and time.2Q&A pairs
- The difference between sidereal and synodic (solar) days and months, the lunar phase cycle, and the astronomical significance of equinoxes and solstices.2Q&A pairs
- Local time and longitude, time zones, GMT and UT, and the astronomical and horological methods of determining longitude, including Harrison's marine chronometer.2Q&A pairs