Stellar Magnitude Observations

import matplotlib.pyplot as plt
import numpy as np

np.random.seed(42)

# Stellar magnitude observations
stars = ['Sirius', 'Canopus', 'Arcturus', 'Vega', 'Capella', 'Rigel', 'Betelgeuse']
magnitude = np.array([-1.46, -0.72, -0.05, 0.03, 0.08, 0.13, 0.42])
uncertainty = np.array([0.02, 0.03, 0.02, 0.01, 0.02, 0.03, 0.05])

fig, ax = plt.subplots(figsize=(10, 6), facecolor='#ffffff')
ax.set_facecolor('#ffffff')

colors = ['#4927F5', '#276CF5', '#27D3F5', '#27F5B0', '#6CF527', '#F5B027', '#F54927']

for i, (s, m, u, c) in enumerate(zip(stars, magnitude, uncertainty, colors)):
    ax.errorbar(i, m, yerr=u, fmt='o', color=c, ecolor=c,
                elinewidth=2, capsize=6, capthick=2, markersize=14,
                markeredgecolor='#1f2937', markeredgewidth=1.5, alpha=0.9)

ax.invert_yaxis()  # Brighter stars have lower magnitude
ax.axhline(y=0, color='#9ca3af', linestyle='--', linewidth=1, alpha=0.5)

ax.set_xlabel('Star', fontsize=11, color='#374151', fontweight='500')
ax.set_ylabel('Apparent Magnitude', fontsize=11, color='#374151', fontweight='500')
ax.set_title('Brightest Stars: Apparent Magnitude Measurements', fontsize=14, 
             color='#1f2937', fontweight='bold', pad=15)

ax.set_xticks(range(len(stars)))
ax.set_xticklabels(stars, rotation=45, ha='right')
ax.tick_params(colors='#6b7280', labelsize=9)
ax.grid(True, axis='y', alpha=0.3, color='#d1d5db')
for spine in ax.spines.values():
    spine.set_color('#d1d5db')

plt.tight_layout()
plt.show()