
Discover the differences among astronomy, astrophysics, and cosmology, and learn celestial coordinates, the celestial sphere, and distance units such as au, light-year, and parsec.
Time is what a clock measures from the sun's position and longitude. The lecture covers GMT, the prime meridian, standard times, and introduces time dilation and the twin paradox.
Discover cosmic materials, including stars, planets, satellites, asteroids, and comets, and how stars fuse hydrogen and helium to emit photons powering eight planets orbiting the sun.
Explore the sun as a star powered by nuclear fusion, its 4–5 billion year age within a 9–10 billion year life, and its photosphere-to-corona layers with solar wind.
Explore gravity and gravitational force, linking mass attraction to planetary orbits and cosmic structure from the Big Bang singularity to Newton’s apple story.
Explain how general relativity treats gravity as space-time curvature around massive bodies, shaping orbits and escape velocity, and show how black holes form and reveal an event horizon.
Explore various telescope types, including the Galileo reflector and the South Pole 10-meter radio telescope, and examine the sun's magnetic activity, solar flares, CMEs, comets, and asteroids.
Explore how machine learning enhances space exploration by optimizing data transmission, enabling computer vision for image analysis, and powering autonomous navigation, rover operations, and mission landing systems.
Explore career pathways in astronomy and astrophysics, from scientist and teaching roles to instrumentation and data handling, and outline bachelor's and master's degree requirements and salary prospects.
Explore the solar system in detail, including the sun, planets, dwarf planets, asteroid belt, and Kuiper belt, with insights on Mars missions and Pluto's double-planet status.
Join an interactive quiz about the solar system, covering the sun, planets and satellites, sunspots, astronomical units, and size comparisons like Jupiter to Earth.
Explore the solar system by examining the sun, planets from Mercury to Neptune, major moons, the asteroid belt, and the dwarf planet Ceres in a disk-like formation of planetary orbits.
Explore the solar system, noting the sun’s 99% mass dominance, sunspots as cooler photosphere regions, and Jupiter’s size relative to Earth; learn about the Kuiper Belt and Obama.
Explore the solar system through a quiz covering astronomical units, Venus, Jupiter, gas giants, and the origins of comets from the Kuiper Belt and Oort Cloud.
Explore sun science and solar system concepts through an engaging quiz on sun distance, diameter, color, habitable zone, magnetic cycle, solar flares, and the Parker Solar Probe.
Test your knowledge of the sun’s life cycle, from red giant and white dwarf phases to formation billions of years ago, and explore the habitable zone and solar system context.
Engage in an earth-focused astronomy quiz that tests your knowledge of the solar system with questions on earth’s orbit, magnetic field, aurora borealis, diameter, mass, altitude, and orbital speed.
Explore how well you know our moon through true/false and multiple-choice questions about its formation, tidal locking, temperature, surface features, and tides.
Explore the gas giants Jupiter and Saturn in this compact astronomy bootcamp, covering orbital periods, moons, rings, and the great red spot in the solar system.
Assess artificial satellites, orbital types, and key space missions through true/false and multiple-choice questions. Learn about Earth and Mars satellites, geostationary and low Earth orbits, and space junk.
Explore spacecrafts from the space age, their roles in communications and earth observations, and landmark missions like Sputnik, Voyager, Venera, Cassini, and Titan.
Whether you want to build a career in astrophysics or space or are just exploring the areas out of interest, this Spotle bootcamp will get you started in the fascinating world of astrophysics and astronomy.
In this course you will learn about
Overview of astronomy and astrophysics
The concept of time
Cosmic or celestial materials
The Sun
Fundamental of forces and gravitational force
Escape velocity and black holes
Different types of telescopes
Application of artificial intelligence in space exploration
Career options in astronomy and astrophysics
The question arises – What is the difference between Astronomy, Astrophysics and Cosmology? So, the differences are very simple. Astronomy actually measures the positions, luminosities, motions and other characteristics of any celestial object, whereas Astrophysics creates the physical theories of small to medium sized structures in the universe, remember, small to medium sized structures in the universe. Whereas, Cosmology does this for large structures, i.e., the entire universe as a whole – all, like galaxies or like other larger structures in the universe.
In our chapter 1, we will start with the basic concept of Astronomy & Astrophysics. So, first let us know what is Astrophysics. So, Astrophysics is a branch of space science that applies the laws of Physics and Chemistry to explain the birth, life and death of stars, planets, galaxies, nebulae, and other objects in the universe as well. It has two sibling sciences – Astrophysics and Cosmology. So, now let’s move to them also.
In chapter 2, we will learn about the time.
At first the question is, what is Time? So, there is a very easy and simple answer that time is what a clock measure. This is what we all know. Now, this time is actually measured based on the position of the sun. Like you all know that when the Sun is exactly at our zenith, now we have discussed about zenith in our last lesson, that approximate, that particular time is called 12 noon. So, the position of the sun actually decides the time. So, the time at any point on earth can be measured by knowing the longitude of that point, which means time changes with longitude and that is very very very important. This concept is very much important for time. So, with the change of longitude, time changes and for the change in each degree of longitude, the change in time is 4 minutes. So, based on these conceptions, we will start, we will go into some other aspects of time.
Update: A quiz section has been added to the course to help you test your knowledge on Solar System and the Universe. The answers have been explained in detail.