Sírius (α CMa) - The brightest star in the sky, known to almost all ancient civilizations, is Sirius. Orion's belt points towards Sirius, extending downwards. There, near the horizon, especially on cold winter nights, we can see a bright blue-white star flickering due to the restless atmosphere. After all, the Greek word "Sirios" means flickering, sparkling. Sirius has a magnitude of -1.5, but compared to other stars, it is not exceptionally luminous. It owes its brightness to its relatively close distance from us - 8.7 light-years, which ranks it fifth in the list of our closest stars (excluding companions). Its luminosity is 23 times greater, its diameter is 1.8 times larger, and its mass is 2.35 times greater than our Sun. Its surface temperature of 10,000 K gives it its blue-white color.

Adara (ε CMa) - A binary star, with its companion of magnitude 8.1 lying at a distance of 7.5" from the primary component, which has a brightness of 1.5 magnitude. Due to the large difference in their brightness, we will need a telescope with an objective diameter of at least 15 cm to resolve them.

τ CMa - A beautiful multiple star is observable even with a small telescope within the open star cluster NGC 2362. It is located in a magnificent environment filled with faint stars. The primary component is yellow with a magnitude of 4.4, while the companion is blue with a magnitude of 10.5. They are separated by 8.2".

μ CMa - In a small telescope, there is an unequally bright pair of stars in mutual contact, with a sparkling contrast of orange and blue color. In a larger telescope, we can separate them with a magnification of 175 times. The yellow component has a brightness of 5.3 magnitude, while the blue component with a brightness of 8.6 magnitude is located at a separation of 3 arcseconds. Two companions with a magnitude of 10 are located slightly further away.

17 CMa - A very beautiful multiple star, even for a small telescope! A low magnification will reveal a stunning wide triple star with a white primary component of magnitude 5.8 and two orange companions forming a right-angled triangle. In the same field of view, a companion of magnitude 9.5 and the double star π Canis Majoris are observed.

h3945 - Winter Albireo or Alamak. A beautiful double star composed of an orange 4.8 magnitude component and a blue component with a magnitude of 6.8. It can be resolved with a small telescope at a separation of 26.6".

Sírius B - In 1834, Friedrich Bessel discovered that Sirius periodically deviates from its position, which could only mean one thing: the star is accompanied by an invisible companion. However, the telescopes of that time were not able to detect it. The big event occurred three decades later, in 1862, when the American optician Alvan G. Clark, an excellent telescope designer, discovered a faint star near Sirius while testing his new 460 mm refractor, later designated as Sirius B - also known as the "Pup" in Anglo-Saxon regions. However, it was not until 1915 that its true physical nature was determined, making it the first ever discovered white dwarf.